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Flexible, hydrophobic, and robust composite films with sandwich structure for electromagnetic interference shielding and Joule heating Polymer (IF 4.6) Pub Date : 2024-03-12 Liang He, Qiyuan Yao, Yinuo Xu, Xiaoming Shao, Yang Chen, Ding Feng, Wencai Wang
Electromagnetic interference (EMI) shielding materials with favorable flexibility, robustness, and multipurpose capabilities are urgently desired for smart wearable devices. Herein, flexible PDMS/cellulose nanofiber/Ag nanowire composite films with sandwich structures were successfully fabricated by a facile method. First, silver nanowires (AgNWs) were uniformly stacked in the upper part of the cellulose
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Influences of amine/epoxide ratio on cross-linking structure and mechanical properties of cured hydrogenated epoxy resin sheets and single-lap joints Polymer (IF 4.6) Pub Date : 2024-03-12 Rasha Ahmed Hanafy Bayomi, Chien-Wei Chu, Kakeru Obayashi, Yuki Ando, Chao-Hung Cheng, Atsushi Takahara, Ken Kojio
The influence of the amine/epoxide ratio (–H/Ep.), controlled from 0.5 to 2.0, on the network structure and mechanical properties of cured epoxy resin (CER) was investigated using a cycloaliphatic epoxy and amine components, in a form of sheets and single-lap joints (SLJs). The cross-linking density and glass transition temperature of CER sheet was the highest at 1:1 stoichiometric –H/Ep. ratio and
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Tailoring cross-linking temperature via hydrogen bonding and steric hindrance towards high-performance fire-Safe Polymer Polymer (IF 4.6) Pub Date : 2024-03-11 Guan-Qi Zheng, Jia-Ning Wu, Lin Zhang, Qin Zhang, Lin Chen, Xiu-Li Wang, Hai-Bo Zhao, Bo-Wen Liu, Yu-Zhong Wang
Constructing thermally cross-linkable structures into thermoplastic polymers has emerged as a compelling strategy to enhance flame retardancy. However, the cross-linking reactions are hard to control, leading unexpected deterioration of processability and mechanical properties. Here, we report a novel strategy to modulate cross-linking reactions utilizing intramolecular hydrogen bonding and steric
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Enhancing polyamide 6: Acid hydrolysis for functionalization and amino group quantification Polymer (IF 4.6) Pub Date : 2024-03-11 Ederson Stiegelmaier, Tamires C. Costa, Giovani Pakuszewski, SeleneM.A. Guelli Ulson de Souza, Antônio Augusto Ulson de Souza, Ana Paula Serafini Immich
In this study, our primary aim was to increase the presence of amine groups in polyamide 6 fibers. To achieve this, we employed a functionalization process that mainly depended on increasing the number of reactive sites via acid-catalyzed hydrolysis. The effects of several acids were rigorously examined, including hydrochloric acid (HCl), sulfuric acid (H2SO4), and formic acid (HCOOH). Following this
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Charge transport and ion migration in perovskite-incorporated conjugated polymer semiconductor Polymer (IF 4.6) Pub Date : 2024-03-11 Benjamin Nketia-Yawson, Vivian Nketia-Yawson, Albert Buertey Buer, Ji Hyeon Lee, Hyungju Ahn, Jea Woong Jo
The migration of intrinsic ions in metal halide perovskites and their interfaces has been shown to contribute to hysteresis and performance degradation in perovskite-based electronic devices, particularly in photovoltaics and transistors. Accordingly, controlling the film morphology, microstructure, and ionic defects in perovskite semiconductors is essential for advancing and achieving high-performance
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Hyperbranched poly (aryl ether ketones) with large volume fluorene approach to excellent solubility and thermal performance Polymer (IF 4.6) Pub Date : 2024-03-11 Ludi Shi, Feng Bao, Caizhen Zhu, Zhaohui Zheng, Xiaobin Ding, Jian Xu
Hyperbranched polymers (HBPs) have the characteristics of low viscosity, high fluidity, and excellent solubility, which enable them to have many potential applications in various fields. In this study, unequal activity 3,4′,5-trifluoro dibenzophenone (B’B) monomers and large volume 9,9-bis (4-hydroxyphenyl) fluorene (A) monomers were used to prepare hyperbranched poly (aryl ether ketones) (HBPAEKs)
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Manufacture of biaxially oriented high-density polyethylene membranes with tunable properties via “structuring” processing strategy Polymer (IF 4.6) Pub Date : 2024-03-11 Daoxin Zhang, Fan Yang, Ming Xiang, Tong Wu, Qiang Fu
Polyethylene (PE) is the most widely used thermoplastic resin in the world now. Among the endless number of PE products, films constitute over 50% of the consumer market and are applied in optical, packing and filtration areas according to distinct condensed structures. In this work, we prepared high-density polyethylene (HDPE)/liquid paraffin (LP) precursor films with various condensed structures
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Swelling behavior of sodium lignosulfonate grafted polyacrylic acid highly absorbent hydrogels with two-phase structure Polymer (IF 4.6) Pub Date : 2024-03-11 Junhao Fei, Tao Tang, Likang Zhou, Huiwen He, Meng Ma, Yanqin Shi, Si Chen, Xu Wang
There exist two theories on the swelling behavior of cross-linked polymer networks treated by statistical thermodynamic and scalar methods, respectively. These two theories predict inconsistent network chain length dependence of the swelling ratio. The swelling of biopolymer gels is analysed with scaling laws from polymer physics, as an alternative for the classical Flory-Rehner theory. In this paper
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Polyethylene oxide mixtures with thymol: Unusual thermal behavior and morphology due to a crystallizable hydrogen-bonded complex Polymer (IF 4.6) Pub Date : 2024-03-09 Konstantin V. Pochivalov, Andrey V. Basko, Tatyana N. Lebedeva, Sergey A. Legkov, Julia V. Kostina, Yaroslav V. Kudryavtsev
Formation of cocrystals in polymer-containing systems attracts a lot of attention lately due to their promise in pharmaceutics, being a poorly studied phenomenon in polymer science. For the first time, we report on the cocrystallization in mixtures of polyethylene oxide and thymol and study in detail the structure and thermal behavior of the mixtures by differential scanning calorimetry, optical microscopy
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Efficient one-pot synthesis of CO2-based functional polycarbonates combining ROCOP and ROMP Polymer (IF 4.6) Pub Date : 2024-03-09 Rui Qu, Zhen Liu, Xi Chen, Hongyi Suo, Yanan Gu, Yusheng Qin
The incorporation of diverse macromolecular blocks into CO-based polycarbonates offers a promising approach for tailoring the properties of polycarbonates for special needs. In this work, we report for the first time the synthesis and characterization of an ABA triblock copolymer polycarbonate--polyalkenamer--polycarbonate in combination of ROCOP and ROMP a one-pot route from CO, epoxides and cycloalkenes
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Coordination/salting-out synergistic construction of multifunctional PVA/chitosan conductive organohydrogel as strain and bioelectrical sensors Polymer (IF 4.6) Pub Date : 2024-03-09 Yao Yang, Jianxun Luo, Jinwei Zhang, Zhijun Ren, Jin Zhou, Haibin Gu
The salting-out action and the cation-induced-crosslinking reaction have been reported separately for the preparation of conductive hydrogels, but there are few studies on the synergistic effect of these two interactions. Also, how to construct flexible strain sensors with more functions is rarely reported by introducing multiple ions through the simple immersion method based on the synergistic action
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Designing hydrolysis-resistant Ti/Zn bimetallic catalyst based on the coordination activation mechanism to synthesize high molecular weight poly (1,5-pentene terephthalate) (PPeT) Polymer (IF 4.6) Pub Date : 2024-03-09 Wufeng Shen, Chaochen Xu, Chao Zeng, Yixiao Yu, Shengming Zhang, Peng Ji, Huaping Wang
The high molecular weight poly (1,5-pentene terephthalate) synthesis and its molecular weight distribution control are still challenging, and one of the critical problems is the lack of efficient catalysts. Based on the coordination activation mechanism, a heavy metal free, hydrolysis-resistant and 1,5-Pentanediol soluble Ti/Zn bimetallic catalyst has been synthesized and characterized. The Ti/Zn bimetallic
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Accessing chemically recyclable polyamides via geminal dimethyl substitution Polymer (IF 4.6) Pub Date : 2024-03-08 Jia-Hao Chen, Yi-Min Tu, Jia-Rong Yao, Xiang-Ting Tang, Yun-Yun Xia, Zhongzheng Cai, Qi Zhang, Jian-Bo Zhu
The development of new chemically recyclable polymers could serve as a means of reducing the plastic pollution and alleviating global energy crisis and monomer design strategy has driven the innovation in this field. In this contribution, α-dimethyl substituted caprolactam (α-DMCL) and γ-dimethyl substituted caprolactam (γ-DMCL) were prepared to evaluate the substitution position effect on chemical
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Microstructural influence on thermal stability of ferroelectric properties in P(VDF-TrFE) spin cast thin films Polymer (IF 4.6) Pub Date : 2024-03-08 Davide Disnan, Fabian Bacher, Stephan Berger, Michael Schneider, Ulrich Schmid
Ferroelectric polymers, like poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), find applications across various fields due to their unique mechanical and electrical properties. This study investigates the impact of thermal loading up to 90 °C on the ferroelectric characteristics of two distinct microstructures, spherulite-like and rice-like, formed during the thermal annealing after deposition
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Mechanically rejuvenated glassy polylactide with spatial heterogeneity and packing efficiency: Time dependence of deformation behavior Polymer (IF 4.6) Pub Date : 2024-03-07 Jie Zhang, De-Zhuang Jia, Guo-Qi Ma, Hao Lin, Hua-Dong Huang, Gan-Ji Zhong, Zhong-Ming Li
Mechanical rejuvenation is effective in conquering the physical aging of polymers, but its molecular origin is far from clear. Herein, glassy polylactide is subjected to mechanical rejuvenation under extensional stress field “casting-thermal stretching”, and the joint effect of spatial heterogeneity and packing efficiency on the brittle-to-ductile transition is demonstrated. The extensional stress
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Synthesis of heat-resistant living polymer particles by one-step reversible addition-fragmentation chain transfer precipitation polymerization of styrene and N-phenylmaleimide Polymer (IF 4.6) Pub Date : 2024-03-07 Shun Yamazaki, Naoya Kaneko, Atsuya Kato, Kohei Watanabe, Daisuke Aoki, Tatsuo Taniguchi, Takashi Karatsu, Yuki Ueda, Ryuhei Motokawa, Koki Okura, Takeshi Wakiya
For the first time, the synthesis of heat-resistant, “living” polymer particles via one-step reversible addition-fragmentation chain transfer precipitation polymerization (RAFTPP) of styrene (St) and -phenylmaleimide (PhMI) is reported. Gel permeation chromatography and nuclear magnetic resonance spectroscopy confirmed that the polymerization proceeded in a living manner. The scanning electron microscopy
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A mechanochemical approach to recycle thermosets containing carbonate and thiourethane linkages Polymer (IF 4.6) Pub Date : 2024-03-06 Rasoul Rahimzadeh, Yazhe Han, Ica Manas-Zloczower
Over the past decades, various industries shifted from traditional materials such as glass and metals to thermoset polymers due to their excellent chemical resistance, thermal stability, reduced weight, and affordability. However, at the end of their life cycle, these highly crosslinked polymers end up as environmental pollutants due to their non-recyclability. To tackle this issue, researchers are
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Construction of porous and hydrophilic polypropylene-based membrane with microphase separation in amorphous region Polymer (IF 4.6) Pub Date : 2024-03-06 Ming Xie, Licheng Wang, Juntao Zhang, Zhengguo Cai, Junfen Sun, Long Chen
Polypropylene (PP) membrane with low porosity and poor hydrophilicity limits the performance of lithium-ion batteries. In mechanism, the function of amorphous structure of precursor film on microporous structure of PP membrane is yet unknown. In this work, the porous and hydrophilic PP/reduced hydroxyl-modified polypropylene (PPrOH) membrane was fabricated by blending esterified-PPOH firstly and then
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Double polymer networks comprising covalent and hydrogen-bonded cross-links Polymer (IF 4.6) Pub Date : 2024-03-06 Ilaria Onori, José Augusto Berrocal, Christoph Weder
We report the investigation of rubbery double networks that are based on poly(-butyl acrylate) (BA) backbones and feature either non-covalent or covalent cross-links. The polymers for the supramolecular network were prepared by reversible addition−fragmentation chain-transfer polymerization of -butyl acrylate and up to 10 mol% of the self-complementary hydrogen bonding motif 2-ureido-4[1H]pyrimidinone
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Drug delivery with melt-spun liquid-core fibers Polymer (IF 4.6) Pub Date : 2024-03-06 Moritz Röthlisberger, Sithiprumnea Dul, Philipp Meier, Giorgia Giovannini, Rudolf Hufenus, Edith Perret
Conventional local drug delivery systems often encounter issues such as burst-release, limited drug reservoirs, rigidity, and low mechanical performance. We present an innovative approach to local drug delivery utilizing melt-spun drug-loaded liquid-core filaments (LiCoFs). LiCoFs were produced, incorporating fluorescein sodium salt as the model drug, dissolved in various liquid core materials, and
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RTV silicone rubbers cured by polyhedral oligomeric silsesquioxane and ladder-like polysilsesquioxane: Thermostability, long-term thermal properties, and pyrolysis mechanism Polymer (IF 4.6) Pub Date : 2024-03-06 Peng Xu, Song Yang, Ruinning Yang, Ruixin Wang, Guangxin Chen, Qifang Li, Zheng Zhou
At present, silicone rubber has been widely used in the fields of aerospace and electronic materials, yet its long-term thermal performance still remains a challenge. In this investigation, polyhedral oligomeric silsesquioxane and ladder-like polysilsesquioxanes with multiple silicon-methoxy groups (MSPOSS, MSLPSQ) were synthesized successfully and used as cross-linkers to cure room temperature vulcanized
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Morphology and confinement effects on crystallization kinetics in polyethylene containing block copolymers Polymer (IF 4.6) Pub Date : 2024-03-06 Maryam Safari, Connie Ocando, Yilong Liao, Markus Drechsler, Nina Volk, Roman Schaller, Martin Held, Volker Abetz, Holger Schmalz, Alejandro J. Müller
This paper investigates the morphology and crystallization kinetics of polyethylene (PE) containing block copolymers, differing in block number (di- . triblock copolymers) and composition (ABA triblock co- . ABC triblock terpolymers). In these block copolymers, the crystallizable PE block is linked to amorphous poly(methyl methacrylate) (PMMA) and/or polystyrene (PS) blocks, and for one triblock terpolymer
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High-temperature relaxation promoting form II-to-form I phase transition of Polybutene-1 Polymer (IF 4.6) Pub Date : 2024-03-06 Yu Han, Xiangyang Li, Tangguo Liu, Jianjun Ding, Yongxing Lin, Lin Chen, Ningdong Huang, Feng Wang, Xingyou Tian
Amorphous coils between crystalline layers of polybutene-1, especially intercrystalline links within, were thought to play a critical role in form I nucleation, but recent experiments found that it actually played a negative role in form II to form I phase transition, that is, obstructing form I growth by hindering translational movements of form II stems. To reexamine the role of amorphous coils,
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Study on the effect of stretching behavior on the properties of PVDF films and mechanism Polymer (IF 4.6) Pub Date : 2024-03-06 Han Guo, Zhaocai Zhang, Yu Zhu
In this paper, the PVDF film prepared by the traditional casting method has good mechanical properties and breaking strength up to 73.51 MPa. Meanwhile, the crystal structure, thermodynamic behavior, electrochemical behavior and morphological characteristics of the stretched PVDF film are studied based on the molecular level deformation mechanism. The results show that the stretched PVDF film has undergone
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Development of toughened and heat-resistant biodegradable injection-molded polylactide acid-based blend foams via enhancing interfacial bonding and PLA phase crystallization Polymer (IF 4.6) Pub Date : 2024-03-05 Xiaohu Bing, Minghui Wu, Wenyu Ma, Mingxian Xu, Xiao Zhou, Long Wang, Wenge Zheng
Polylactic acid (PLA) foam is gaining increased attention as a biodegradable alternative to traditional petroleum-based plastic foams, which pose significant environmental pollution issues post-use. However, its potential application is greatly limited by inherent shortcomings such as brittleness and diminished heat resistance post-melting. Herein, high-performance biodegradable PLA/poly(butylene succinate)
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Effect of mechanical recycling on molecular structure and rheological properties of high-density polyethylene (HDPE) Polymer (IF 4.6) Pub Date : 2024-03-05 Jian Zhang, Valerian Hirschberg, Anika Goecke, Manfred Wilhelm, Wei Yu, Michael Orfgen, Denis Rodrigue
This study investigates the degradation of high-density polyethylene (HDPE) during successive closed-loop mechanical recycling via multiple extrusion. The main objective is to perform a comprehensive analysis of the rheological property changes associated with molecular characteristics. High temperature size exclusion chromatography (SEC) was performed first showing that more than 95% mass recovery
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Composite nano-fibrillated cellulose-alginate hydrogels: Effect of chemical composition on 3D extrusion printing and drug release Polymer (IF 4.6) Pub Date : 2024-03-05 Alejandro Hernandez-Sosa, Jorge Mercado-Rico, Elena Usala, Gabriela Cataldi, Adrian Esteban-Arranz, Evis Penott-Chang, Alejandro J. Müller, Zoilo González, Eduardo Espinosa, Rebeca Hernández
In this work, composite hydrogels of nanofibrilated cellulose (CNF) and alginate were prepared through direct addition of alginate in powder to a CNF hydrogel. Alginate was hydrophobically modified with C8 alkyl chains (HMAlg), and the effect of chemical modification on the rheological properties and printability of the resulting composite gels was evaluated. The rheological characterization of the
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Multi-network systems in elastomers using dynamic bonds and static covalent bonds “Coexistence between thermoplasticity and heat resistance” Polymer (IF 4.6) Pub Date : 2024-03-04 Keisuke Chino
In general, since rubber has a weak interaction between molecular chains, if it is not crosslinked, it will flow and cannot withstand actual use. Static covalent crosslinked rubber has high mechanical properties due to the strong bonding force of crosslinking, but it is difficult to be reshaped and recycled because of the difficulty to cleave the crosslink. On the other hand, thermoplastic elastomers
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Morphology evaluation and mechanical properties of oil-resistant thermoplastic vulcanizates comprising carboxylated nitrile butadiene rubber and thermoplastic polyurethane and their comparison with commercial grades Polymer (IF 4.6) Pub Date : 2024-03-04 Aditya Jindal, Jiansheng Feng, Damian Jacob White, Taylor Lynn Wilson
The morphology, the mechanical properties, and the oil-resistance of thermoplastic vulcanizates (TPVs) of carboxylated nitrile butadiene rubber (XNBR) and thermoplastic polyurethane (TPU) were studied & compared with the commercial ethylene-propylene-diene monomer (EPDM)/polypropylene (PP) TPVs from two suppliers. The rubber phase in these new generations of TPVs was cured with an addition-type curative
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Synergistic compatibilization effect on phase morphology evolution and properties of poly(ether-block-amide)/ethylene-vinyl acetate blends Polymer (IF 4.6) Pub Date : 2024-03-04 Zhibo Chen, Jinsen Cui, Yu Lin
We investigate the synergistic effect of ethylene-vinyl acetate grafted maleic anhydride (EVA-g-MAH) and styrene-ethylene-butene-styrene grafted maleic anhydride (SEBS-g-MAH) compatibilizers on the phase morphology evolution, thermal and mechanical properties of polyether--amide/ethylene-vinyl acetate (PEBA/EVA) blends. Phase morphology of PEBA/EVA blends shows that the size of dispersed phase decreases
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Phantom chain simulations for fracture of end-linking networks Polymer (IF 4.6) Pub Date : 2024-03-04 Yuichi Masubuchi
Despite numerous studies, the relationship between network structure and fracture remains unclear. In this study, the fracture properties of end-linking networks were compared with those of loop-free analogs made from star prepolymers by performing phantom chain simulations. The networks were created from equilibrated sols of stoichiometric mixtures of linear prepolymers and -functional linkers through
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Modification of antibacterial and self-cleaning composite membrane using thermo-responsive hydrogel for fish ball industrial wastewater treatment Polymer (IF 4.6) Pub Date : 2024-03-04 Kiattinatapon Juengchareonpoon, Natnicha Proyrungthong, Saiwan Nawalertpanya, Waritha Jantaporn
Membrane technology is commonly used to treat wastewater in the food industry. However, membrane fouling remains a major problem. This research aims to study the development of composite membranes with antibacterial properties and self-cleaning ability to solve the membrane fouling problem for fish ball industrial wastewater treatment. Polyethersulfone (PES) membrane was modified with poly(N-isopropyl
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Solvent- and solvothermal-induced phase transitions and crystallisations in syndiotactic polystyrene and multiblock copolymer syndiotactic polystyrene-co-cis-1,4-polybutadiene Polymer (IF 4.6) Pub Date : 2024-03-04 Antonio Buonerba, Paola Rizzo, Carmine Capacchione, Alfonso Grassi
. Simple and rapid solvent- and solvothermal-induced crystallisation of syndiotactic polystyrene (sPS) and syndiotactic polystyrene polymer segments in the multiblock copolymer syndiotactic polystyrene---1,4-polybutadiene (sPSB) into the desired crystalline form have been disclosed and herein reported. Stirring polymer powders of sPS in the chloroform/water solvent mixture allows crystallisation of
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Synthesis of pyrogallol triglycidyl ether: A bio-based epoxy resin monomer with low viscosity, high activity, and good thermomechanical properties Polymer (IF 4.6) Pub Date : 2024-03-04 Yu Long, Weihua Han, Zhaoliang Xing, Chuncheng Hao
With increasing development of chip and circuit integration, the requirements regarding the viscosity, activity, and thermomechanical properties of underfill are becoming increasingly stringent. However, common low-viscosity resins are often obtained with poor thermal and thermomechanical properties. In this study, natural renewable pyrogallol was used as a raw material and preparedto prepare a high-performance
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In situ polymerised polyaniline films over multi-walled carbon nanotubes coatings for enhanced photoelectrochemical performance Polymer (IF 4.6) Pub Date : 2024-03-02 Alessandra A. Correa, Moises A. de Araújo, Lucia H. Mascaro, Luiz H.C. Mattoso, Jose M. Marconcini
Polyaniline (PANI), which is a π-conjugated polymer, has stood out as a promising candidate for dihydrogen generation in photoelectrochemical (PEC) cells owing to its suitable optoelectronic properties and excellent stability. Nevertheless, the PEC performance of this material is still far from adequate for technological applications. Herein, we have focused on improving the PEC performance of PANI
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The thermo-optical coefficient as an alternative probe for the structural arrest of polymeric glass formers Polymer (IF 4.6) Pub Date : 2024-03-01 A. Klingler, B. Wetzel, J.K. Krüger
The most important, yet independent susceptibilities to characterize the canonical glass transition include thermal expansion, specific heat and shear modulus. All these susceptibilities show a step-like behaviour as a function of temperature. However, in principle, different susceptibilities provide different perspectives on the glass transition. Due to the effect of sample history and considerable
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Dual reconfigurable network from a semi-crystalline functional polyolefin Polymer (IF 4.6) Pub Date : 2024-03-01 Diego Ciardi, Benedetta Rigatelli, Emmanuel Richaud, Michel Cloitre, François Tournilhac
A statistical copolymer p(E-co-GMA) of ethylene and glycidyle methacrylate (4.5 wt%) is considered as a starting point towards semicrystalline networks with exchangeable links. Application of the binomial law to size exclusion chromatographic data suggests that chains deprived of reactive comonomers would represent less than 6 wt% of the total, allowing to expect the formation of high gel-content networks
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In situ study on the tensile deformation in high-density polyethylene/hexagonal boron nitride composite Polymer (IF 4.6) Pub Date : 2024-03-01 Yi Liu, Yao Feng, Zichao Li, Ying Lu, Fengmei Su
Tensile deformation in the post processing of polymer plays a critical role in determining its mechanical properties. In this work, we investigated the structure evolution of high-density polyethylene/hexagonal boron nitride (HDPE/h-BN) composite during stretching in a wide temperature range from 25 °C to 100 °C in order to reveal the suitable post processing temperature of HDPE/h-BN composites fiber
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Solvent-induced microphase separation membranes of block poly (aryl ether sulfone) copolymer with high selectivity of O2/N2 separation Polymer (IF 4.6) Pub Date : 2024-03-01 Zhe Cheng, Pei Wang, Yunlong Sun, Zhipeng Wang, Guangyuan Zhou
Gas separation membranes have a wide range of applications in industry, and there are two important factors in judging membrane standards permeability and selectivity. How to improve the selectivity of gas separation membranes while improving permeability is a challenge. In this study, poly (aryl ether sulfone) (PES) block copolymers were synthesized from fluorine-terminated polysulfone (PSF–F) and
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Preparation of multifunctional PVDF/AgNWs nanofiber membranes and study on their warmth retention properties Polymer (IF 4.6) Pub Date : 2024-02-29 Yongjing Fu, Huijia Wang, Chuan Zhou, Yiming Wang, Ni Li
Heat insulation and solar energy use are attractive strategies to cope with the serious and external cold environment. Here, silver nanowires (AgNWs) with high purity and aspect ratio were synthesized by polyol method and PVDF/AgNWs nanofiber membranes were prepared by electrostatic spinning. We investigated the warmth retention properties of nanofiber membranes using a heating table and simulated
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Unraveling molecular loss processes for dielectric polymers in the Terahertz frequency range: Impact of polarity and chain rigidity Polymer (IF 4.6) Pub Date : 2024-02-29 Haokun Xiao, Jianjian Huang, Mengmeng Wang, Weixi Huang, Maoyuan Li, Gang Jin
Dielectric polymers serve as integral materials in both 5G (up to GHz, 10 Hz) and 6G (up to THz, 10 Hz) technologies. Despite their significance, the mechanisms governing the loss properties and dielectric responses at high frequencies are not fully understood, posing challenges in the rational design of polymers with targeted loss properties. The loss properties and dielectric responses are influenced
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A strategy for improving self-healing efficiency: Application of sensitizer in thymine photoresponsive materials Polymer (IF 4.6) Pub Date : 2024-02-29 Bin Pu, Gaolang Xiao, Juying Xiao, Hua-Bing Yin, Jin Wang
Self-healing materials based on photodimerization have advantages such as being fast, efficient, environmentally friendly and controllable. However, most of photoresponsive self-healing materials suffer from a problem that there is a compromise between the strength and the self-healing efficiency. Therefore, most of the research focuses on using flexible materials to reach high self-healing efficiency
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Synchronously improved energy storage density and water resistance of cellulose/MXene composite film via glutaraldehyde-assisted crosslinking Polymer (IF 4.6) Pub Date : 2024-02-29 Fan Zhang, Meng-hang Gao, De-xiang Sun, Nan Zhang, Jing-hui Yang, Xiao-dong Qi, Yong Wang
Utilizing biomass to create eco-friendly dielectric materials satisfies the criteria for sustainable development in terms of both environmental protection and economic growth, but the relatively low energy storage density is far below the application requirements. Here, regenerated cellulose/MXene (RC/M) composite films were manufactured, and a glutaraldehyde (GA)-assisted crosslinking was proposed
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Synthesis and evaluation of mono(phenoxy-imine) titanium complexes attached to a single polystyrene chain end for ethylene polymerization Polymer (IF 4.6) Pub Date : 2024-02-29 Zhen Dong, Feng Yu, Chuanjiang Long, Lang Luo, Sitong Feng, Kun Cao, Zhong-Ren Chen
Monodisperse polystyrene (PS) chains with different lengths are synthesized by atom transfer radical polymerization (ATRP), serving as soluble supports for attaching mono(phenoxy-imine) metal complexes in the chain end. For ethylene polymerization, the PS chain-supported titanium (Ti) complexes exhibit unique catalytic features such as higher activity. Their performance in ethylene polymerization and
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Facile preparation of SAN/NBR TPV with balanced stiffness-toughness via metal-ligand coordination-induced dynamic vulcanization and in situ interfacial compatibilization Polymer (IF 4.6) Pub Date : 2024-02-29 Jiarong Huang, Haonan Wu, Xiao Wang, Huiwen Yu, Shuping Xiao, Lingcao Tan, Baiping Xu
In this work, metal-ligand coordination interaction was utilized to induce the dynamic vulcanization (DV) of styrene-acrylonitrile copolymer (SAN)/butadiene acrylonitrile rubber (NBR)/cupric sulfate (CuSO) TPVs. The TPVs exhibited co-continuous structure, in which the CuSO particles distributed in continuous NBR network to cross-link NBR phase through interaction between Cu and nitrile groups (-CN)
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Efficient exfoliation and dispersion of expanded graphite through dry ice explosion synergized shear flow field for high-thermal conductive NR/EG composite preparation in large-scale Polymer (IF 4.6) Pub Date : 2024-02-29 Mengni Chen, Yurong Hao, Chuanbiao Zhu, Shuang Liu, Shilong Liu, Xinpeng Hu, Xiaolong Li, Hao Wu, Xiang Lu, Jinping Qu
Thermal interface materials (TIMs) are one of the important components of materials used in electronic packaging processes to reinforce the interface heat transfer between electronic components. High thermal conductive filler-reinforced polymer composites are receiving increasing attention in electronic packaging for their excellent thermal conductivity and low cost, but their applications are limited
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Grafting well-defined polymers onto unsaturated PVDF using thiol-ene reactions Polymer (IF 4.6) Pub Date : 2024-02-28 Ting-Chih Lin, Piotr Mocny, Martin Cvek, Mingkang Sun, Krzysztof Matyjaszewski
Poly(vinylidene fluoride) (PVDF) is commonly used in membranes, lithium-ion battery binders, and coatings due to its thermal and chemical robustness. Nevertheless, PVDF-based copolymers can broaden the application scope and performance capabilities of pristine PVDF. PVDF has been modified via grafting-from reactions. However, grafting density and graft length, two important properties of graft copolymers
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Preparation of environmental-benign castor oil-derived polyurethane thermal conductive structural adhesives with superior strength Polymer (IF 4.6) Pub Date : 2024-02-28 Qiao Qin, Daidong Wei, Jiamin Gan, Yunpeng Gong, Tao Jin
Thermal conductive structural adhesives offer a robust solution for injection into the battery core of power battery packs in new energy vehicles, effectively providing filling, protecting, and facilitating timely heat dissipation. In this work, a series of castor oil (CO)-based polyurethane prepolymers with different isocyanate (NCO) contents were synthesized by a solvent-free method, which designated
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Multi-functional fluorescent silicon elastomer cross-linked with AIE polymer by dynamic imine bond and its application in anti-counterfeiting Polymer (IF 4.6) Pub Date : 2024-02-27 Ying Dong, Xiaoying Lu, Youping Wu, Jianping Deng
Fluorescent elastomer materials have received extensive attention due to their excellent optical performance, flexibility, and chemical stability in recent years, and demonstrate great application potentials in intelligent sensors, optoelectronic devices, medical equipment and other fields. Although the traditional method for constructing fluorescent elastomers by doping fluorescent small molecules
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Rigid and crosslinkable polyimide curing epoxy resin with enhanced comprehensive performances Polymer (IF 4.6) Pub Date : 2024-02-27 Yifan Li, Jiahui Li, Wenhao Zhang, Qiyun Lin, Lingcheng Chen, Zhihuan Weng, Yi Xiao
The flammability and hydrophilicity of epoxy resins hinder their applications in the high-tech fields of aerospace and electronics. To break these limitations, a highly rigid and hydrophobic polyimide structure has been designed as the harder for epoxy resins. This diamine monomer polyimide (PI–OH) featured a new spiral fluorene-xanthene core doubly grafted phenolic hydroxyl units, to match the commercial
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Applicability of Kroon network theory for biaxial mechanics in rubber through multiscale approach Polymer (IF 4.6) Pub Date : 2024-02-26 Zhu Yan, Fahmi Zaïri, Ali Zaoui
In this paper, we address the problem of the multiscale prediction of the multiaxial hyperelastic behavior of rubber. Our goal is to test the predictive capabilities of a hyperelastic model grounded in the principles of continuum mechanics, bridging the gap between continuum-level mechanics and molecular-level descriptions. This constitutive model posits that macroscopic behavior results from the non-affine
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Effect of thermal processing conditions on the structure and properties of porous PENK/PVDF composite films and its application as lithium-ions separators Polymer (IF 4.6) Pub Date : 2024-02-25 Yu Zheng, Guo Lin, Chao Mo, Liang He, Lifen Tong, Xiaobo Liu
By developing high-performance lithium-ion battery technology, the demands on the design of separator modification have increased. However, battery performance and safety are limited by conventional polyolefin separators' poor thermal resistance and electrolyte wettability. Biphenyl-type poly (arylene ether nitrile ketone) (BP-PENK) is synthesized. PENK polymers are a class of poly (aryl ether) with
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Synthesis and characterization of amino-functional polyesters composed of lactic acids and serine amino acids Polymer (IF 4.6) Pub Date : 2024-02-24 Ying Wei, Xiaoyuan Li, Hudie Yuan, Yanxin Qi, Yubin Huang
Functional polyesters with good biocompatibility are always important biomaterials. In this study, poly (latide---trityl serine ester)s (P (LA--TSL)s) were synthesized through the copolymerization of lactide (LA) and -trityl serine lactone (TSL) in toluene under 90 °C with the catalysis of diethylzinc. The molecular weight (Mn) of P (LA--TSL) with different TSL molar ratios (4.5%, 8.8%, 25.2%, 41.7%
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A novel method for preparing anisotropic negative Poisson's ratio composite foam with excellent structural stability and shape recovery property Polymer (IF 4.6) Pub Date : 2024-02-24 Donglei Fan, Niexin Li, Yongjiang Li, Haiping Xing, Song Wang, Sanxi Li, Zhiwei Jiang, Minggang Li, Tao Tang
Negative Poisson's ratio (NPR) foams are usually prepared by the transformation of positive Poisson's ratio (PPR) foams with honeycomb cell structure, which face a challenge for restraining the increase in volume and Poisson's ratio once they are stimulated by high temperature. In addition, they cannot restore to its reentrant structure after large deformation. In this work, a novel method for preparing
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Analyzing isothermal crystallization of poly(lactic acid)/polyol systems: Correlated DSC and simulation studies Polymer (IF 4.6) Pub Date : 2024-02-24 Biao Yang, Baomin Fan, Huifang Wang, Yuhong Ma
The isothermal crystallization behavior and kinetics of poly(-lactic acid) (PLLA) melt-blended small amounts (0.7%–1%) of polyols (D-mannitol, D-sorbitol, and xylitol) were investigated by differential scanning calorimetry (DSC), and the interaction between polyols and PLLA was clarified via multiscale theoretical simulations. The decreased peak crystallization time and full width at half peak maximum
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Development and performance evaluation of re-crosslinkable preformed particle gel under high temperature and high salt conditions Polymer (IF 4.6) Pub Date : 2024-02-23 Yingying Zhai, Zhen Fang, Jiao Feng, Changjiang Sun, Wenjuan Deng, Yangbing Wen
Self-healable hydrogels have attracted significant interests in the fields of environmental protection, oil plugging and electronic sensors, etc. Benefiting from the synergistic contribution of hydrogen bonding and ligand chelation, in this work, we prepared a series of self-healable hydrogels via a simple and inexpensive approach, which overcame the limitations of the intrinsic nature of dynamic covalent
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The impact of architecture on the behavior of siloxane-grafted Polymethacrylate Polymer (IF 4.6) Pub Date : 2024-02-23 Magdalena Tarnacka, Rafał Bielas, Anjana Krishna S V, Zaneta Wojnarowska, Paulina Maksym, Dorota Neugebauer, Marian Paluch, Kamil Kamiński
In this paper, we studied for the first time the impact of the molecular weight, , and the topology on the molecular dynamics of a series of grafted poly(poly(dimethylsiloxane methacrylate)) (polyPDMSMA). The behavior of grafted (molecular brushes) polyPDMSMA and their three-armed counterparts of tailor-made properties prepared by Atom Transfer Radical Polymerization (ATRP) was monitored by means of
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Light-induced additive manufacturing in membrane technology Polymer (IF 4.6) Pub Date : 2024-02-23 Abdollah Khosravanian, Michael T. Scalzo, Huacheng Zhang, Benny D. Freeman, Ryan A. Mulvenna, Matthew R. Hill, Timothy F. Scott
Membranes have been extensively investigated as key enabling technologies to exit energy-intensive separation processes. Nevertheless, conventional membrane fabrication techniques present several challenges, such as requiring tight process controls during fabrication to achieve optimal microstructures, geometric limitations, and time-consuming fabrication processes for composite and mixed matrix membranes
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Synthesis of trehalose-grafted poly(ester amide) with potential ice recrystallization inhibition activity Polymer (IF 4.6) Pub Date : 2024-02-23 Zongze Li, Kongying Zhu, Lixia Ren, Xiaoyan Yuan
The ice recrystallization inhibition (IRI) activity of a macromolecular cryoprotectant is of great significance for applications in cryopreservation of biosamples. Herein, in order to create a possibly biodegradable trehalose-modified polymer, thiol-monosubstituted trehalose was synthesized by a simplified method, and then tethered to allylated-based poly(ester amide) (PEA) via thiol-ene click reaction
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Robust polyvinyl alcohol with broad thermoplastic window enabled by controlled citrate-plasticizing adding ways Polymer (IF 4.6) Pub Date : 2024-02-23 Yushun He, Shengdu Yang, Hao Zhang, Pan Tian, Junhua Zhang
Given that the decomposition temperature is close to the melting point, polyvinyl alcohol (PVA) fails thermoplastic processing. Developing a suitable plasticizer-enhancing system to reduce melting point or increase the decomposition temperature, resulting in generating a temperature window of thermoplastic processing is an urgent research topic in practical processing applications. In this work, triethyl