样式: 排序: IF: - GO 导出 标记为已读
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Metathetic degradation of waste vulcanized emulsion type butadiene-based rubber Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-18 Changou Pan, Zhirong Shi, Ruochen Zhang, Peng Liu
Metathetic degradation has been recognized as promising strategy for the treatment of waste vulcanized rubbers as a Waste-to-Resources approach, not only eliminating the pollution but also recycling as resources. However, it was mainly used for the treatment of the waste vulcanized natural rubber, which contains plentiful -1,4- structure. Despite of a much higher consumption of the emulsion type butadiene-based
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Towards sustainable solutions: A review of polystyrene upcycling and degradation techniques Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-16 Bhaskarchand Gautam, Tsung-Hung Tsai, Jiun-Tai Chen
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Alginic acid derivatives/DOPO modified epoxy resins: Excellent flame retardancy, mechanical properties, chemical resistance Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-16 Chenyu Zhou, Kunxiong Wu, Yan Zhang, Zhiquan Pan, Lu Feng, Hong Zhou
An alginic acid derivative AA@MEL with flame retardant effect in both gas and condensed phases was synthesized by the neutralization reaction of alginic acid (AA) and melamine (MEL). Modified EP obtained the UL-94 V-0 rating and limiting oxygen index (LOI) of 33.8 % when the total addition of AA@MEL and 9,10-dihydro-9-oxa-10-phosphophenanthrene-10-oxide (DOPO) in the epoxy resin was only 4 wt% and
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Non-covalently functionalized black phosphorene to efficient flame retardant EVA with improved mechanical properties Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-16 Yueyue Yu, Shan Tang, Dong Feng, Yuhui Xie, Feng Wu, Delong Xie, Yi Mei, Hao Huang
The development of flame-retardant polymer materials play a vital role in reducing fire hazards and protecting both lives and property. Black phosphorus (BP) is an extremely promising flame retardant since its synergistic flame retardancy with different modifiers. Nevertheless, the issue of unven dispersion within the polymer matrix has severely restricted its practical applications. Herein, BP nanosheets
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Amphiphilic molecules affording efficient aqueous degradation of unsaturated polyester resin Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-12 Peng Zhao, Xiaojing Cui, Chizhou Wang, Xiaojie Shao, Hongyan Li, Ning Zhang, Xianglin Hou, Tiansheng Deng
Enormous challenges have been encountered in the degradation and recycling of unsaturated polyester resin (UPR) in water, primarily due to its water resistance. Herein, a novel, efficient and green catalytic system of methanesulfonic acid (MSA)/sodium laurylsulfonate (SLS) was proposed to aqueously degrade UPR under mild conditions (200°C). This method is considerably milder compared to other reported
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The impact of mechanical recycling on the degradation of polyamide Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-10 Pearleen Pin Xiu Yap, Zhihao Yen, Teddy Salim, Henry C.A. Lim, Chee Keong Chung, Yeng Ming Lam
There is currently no agreement on the degradation mechanisms for PA6 as a result of mechanical recycling. In this study, PA6 was extruded five times to simulate mechanical melt recycling process. Both virgin PA6 and the extruded PA6 were characterised to determine the predominant degradation mechanism. Melt flow rate (MFR) increases with increasing number of extrusion passes suggesting a reduction
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Adhesion behaviors and kinetics at silicone foam/metal interfaces Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-09 Bowen Dai, Qiang Liu, Fan Jin, Wei Huang, Binlian Jiang, Zhendong Huang, Yiren Song, Hongbing Chen
Adhesion behaviors occur at the polymer/metal interface after extended contact time. Specially, silicone foam would adhere when compressed in a metal device, which may negatively impact the reliability of equipment. The purpose of this study is to understand the adhesion behavior: The effect of influence factors (i.e., temperature and mechanical compression) and the corresponding adhesion kinetics
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A multifunctional integrated coating reinforced with exfoliated boron nitride towards superior decorative, antibacterial, durable, and flame-retardant performances Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-06 Zheng Wei, Jingjing Guan, Long Yan, Xinyu Tang, Zhisheng Xu
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Bismuth oxyiodide nanorods towards improvements in fire safety and mechanical properties of natural rubber Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-06 Qingshi Meng, Xiurui Zhang, Shuangshan Li, Sensen Han, Yanxi Zhang, Bin Wu, Hailan Kang
Fire safety represents an enduring challenge in the realm of polymer-based nanocomposites, significantly limiting their application. The utilization of bismuth oxyiodide in flame retardant applications offers advantages such as increased surface area for improved interaction with combustible materials, the formation of a uniform flame retardant layer at the interface, and enhanced thermal stability
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Construction of thermally resistant and flame-retardant multifunctional polyester composite fabrics Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-06 Liang Liu, Liang Gu, Xin Zhang, Yi-Ming Xu, Wei Xie, Xian-Wei Cheng, Jin-Ping Guan
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Preparation of flame retardant and antibacterial polyacrylonitrile composites based on modified microcrystalline cellulose loaded silver nanoparticles Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-06 Lei Shi, Xizhi Chen, Chunlong Zuo, Lixiao Gao, Xi Yu, Yuanlin Ren, Xiaohui Liu
To improve the fire safety of polyacrylonitrile (PAN) and expand its application area, flame retardant and antibacterial PAN composite was prepared by a simple and environmentally friendly method. First, AgNO and NaBH solutions were added to the microcrystalline cellulose (MCC) aqueous suspension to prepare MCC loaded Ag nanoparticles (Ag NPs) (MCC/Ag) by in situ reduction. Then, MCC/Ag was mixed in
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Synergistic impact of molecular vibration and charge behavior on enhanced insulation failure in silicone gel under ultra-fast pulsed electric field Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-03 Teng Gao, Dongxin He, Zhizhen Liu, Shijie Xie, Zhe Xu, Junyu Wei
Due to the extreme operating conditions of high voltage rising rate, silicone gel materials used in the encapsulation insulation of power electronic devices are prone to insulation failure. In this paper, we proposed a mechanism of insulation degradation under the ultra-fast pulsed electric field by considering the synergistic effect of molecular vibrations and charge behaviors. With the quantum dynamic
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Synergism between α-amino acid-derived polyamidoamines and sodium montmorillonite for enhancing the flame retardancy of cotton fabrics Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-03 Alessandro Beduini, Federico Carosio, Paolo Ferruti, Elisabetta Ranucci, Jenny Alongi
Polyamidoamine (PAA)/sodium montmorillonite (MMT) nanocomposite coatings were investigated as flame retardants for cotton to ascertain whether the addition of clay improved the efficacy of PAAs thanks to its ability to act as insulating shield during combustion. Three amphoteric PAAs were obtained by reacting -methylenebisacrylamide with natural α-amino acids, namely glycine (M-GLY), arginine (M-ARG)
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Recyclable porous core-shell Mn-Co-O flame retardant for improving flame retardancy and smoke suppression of epoxy resin Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-03 Yingbing Zou, Kui Niu, Fubin Luo, Hongzhou Li
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A zinc-embedded multicomponent copolymer customized for polypropylene and its synergistic flame-retardant effect and outstanding mechanical properties Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-03 Yimai Zhang, Lijun Qian, Jingyu Wang, Yong Qiu, Wang Xi
The poor compatibility between the common polar intumescent flame-retardant system (IFR) and the nonpolar polypropylene (PP), as well as the high additive amount, seriously impacts the mechanical properties of the composites. This study introduced collaborative flame-retardant technology to construct block copolymer flame retardants and prepared a zinc-embedded multicomponent copolymer (PM-Zn) customized
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Grafting of voltage stabilizer onto EPDM surface and its inhibition effect on the breakdown of EPDM/XLPE interface Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-04-02 Chunyang Li, Duo Ji, Yuxin Wan, Xu Yang, Manzhi Shao, Hong Zhao, Jiansheng Sun
Surface discharge on the EPDM/XLPE interface is threatening the safe operation of power cable system and limiting the further improvement of its voltage level. To improve the electrical strength of EPDM/XLPE interface, the surface of EPDM was modified by grafting of voltage stabilizer 4-allyloxy-2-hydroxybenzophenone (AOHBP) based on liquid-phase impregnation and subsequent free radical grafting reaction
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Synthesis, characterization, and thermal pyrolysis mechanism of high temperature resistant phenolphthalein-based poly (arylene ether nitrile) Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-31 Xulin Yang, Haiwen Tang, Yi Li, Yingqing Zhan, Ying Li, Fei Zhong, Pan Wang, Wei Feng, Kui Li
Phenolphthalein (PP) is usually used as a functional monomer to design novel high performance polymers with adjustable thermal, mechanical, and fluorescent properties. In this study, a soluble, amorphous, high temperature resistant PP-based poly (arylene ether nitrile) (PAEN) was synthesized and its corresponding thermal decomposition mechanism was reported via TGA/DTG, TGA/FTIR and TGA/MS analysis
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Synthesis of two TiO2-based prodegradant additives and their efficiency in inducing the accelerated photo-oxidation of low-density polyethylene Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-31 Ricardo Acosta Ortiz, Roberto Yañez Macías, Katia Gomez Alfaro, Víctor Javier Cruz Delgado, Francisco Rodriguez González, José de Jesús Ku Herrera, Aida Esmeralda Garcia Valdez
In this study, two prodegradant additives derived from TiO nanoparticles were synthesized and comprehensively characterized through a range of analytic techniques, such as X-ray diffraction (DRX), Fourier Transform Infrared Spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The hydroxyl groups adsorbed on the surface
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Understanding seawater-induced fatigue changes in glass/epoxy laminates: A SEM, EDS, and FTIR study Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-29 H. Vidinha, L. Durães, M.A. Neto, A.M. Amaro, R. Branco
Composite polymeric materials have exhibited significant advantages when operating in hostile conditions such as the marine environment. However, there is a lack of information concerning three-dimensional variations induced by prolonged exposure to seawater in composite structures and their impact on fatigue performance. Thus, this study aims to investigate the effects of long-term exposure to natural
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Exploratory DSC investigation on the solvolytic depolymerization of PET in varied solvent systems and in the presence of model additives and contaminants Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-27 Antonio Jaime-Azuara, Edoardo Longo, Emanuele Boselli, Marco Baratieri, Thomas Helmer Pedersen
Solvolytic depolymerization of polyethylene terephthalate (PET) is a thermo-chemical recycling route that valorizes plastic waste by recovering monomers and chemicals that can be reused for the synthesis of new polymers. This study focuses on neutral hydrolysis due to the potential environmental and economic benefits of water as depolymerization agent compared to alternative organic solvents. High-pressure
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Migration and transformation mechanism of Cl during polyvinyl chloride pyrolysis: The role of structural defects Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-24 Hanxian Meng, Ji Liu, Yuangu Xia, Bin Hu, Huaide Sun, Jihong Li, Qiang Lu
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Eco-friendly preparation of advanced epoxy composites and their pyrolysis and flame retardant mechanisms Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-20 Zhenzhen Mi, Fukai Chu, Weizhao Hu, Yuan Hu, Lei Song
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The mechanism of the influence of radiation heat flux on the combustion behavior of raw rubbers Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-20 Yong Wang, Chengxiang Zou, Yan Ding, Lei Duan, Aohui Zhou, Shiyang Sun, Ying Lu
Understanding the combustion behavior of rubbers is crucial for predicting their fire hazards. The cone calorimeter experimental results in this study confirm that the combustion behavior of raw rubbers depends on the rubber type and the heat flux. Natural rubber and ethylene-propylene-diene monomer rubber exhibit heat release rate (HRR) curves with only one peak at the end of the burning stage under
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Characterization of the abiotic degradation of oxo-biodegradable polypropylene obtained from transition metal-free pro-oxidant Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-20 João Augusto Osório Brandão, Pedro Tonom Martin, Fernando dal Pont Morisso, Edson Luiz Francisquetti, Ruth Marlene Campomanes Santana
The pro-oxidant additives used in the production of oxo-biodegradable polymers are generally organic salts of transition metals added during the processing of polyolefins. Transition metals accelerate the photooxidation and thermal oxidation of macromolecules, producing oxygenated fragments which are then used as nutrients by microorganisms in the biodegradation process. However, the use of these additives
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Recent insights into hydrogen-induced blister fracture of rubber sealing materials: An in-depth examination Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-18 Chilou Zhou, Yiran Zheng, Zhengli Hua, Wenjie Mou, Xianhui Liu
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Alkali hydrolysis of wool fibres using microwave irradiation as a recycling approach for handling wool-waste Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-18 Evangelia C. Vouvoudi, Maria I. Dimaki, Nina Maria Ainali, Lelouda-Athanasia Koronaiou, Dimitra A. Lambropoulou, Nikolaos F. Nikolaidis, Dimitrios N. Bikiaris
The aim of the present work is to investigate the influence of microwave irradiation on alkali hydrolysis, under various thermochemical conditions, of wool fibres. This perspective seems to be a promising alternative for the valorization of wool waste. The reaction yield is calculated in every case in order to determine the optimum hydrolysis conditions. The solid residue, as well as the filtrate,
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Characterization methods to predict extrusion performance in thermoplastic polyurethane batches Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-16 John P. Reynolds, James R. Brown, Arit Das, Timothy E. Long, Patrick Willoughby, Joseph Delaney, Tatyana Dyndikova, Michael J. Bortner
Thermoplastic polyurethanes (TPUs) are a class of urethane elastomers which flow at elevated temperatures, enabling a diverse set of processing techniques including industrial-scale extrusion and injection molding. Due to variations in the relative content of hard and soft segments within the polymer chains, as well as block lengths and chemistries, this material exhibits a wide range of viscoelastic
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The effect of anionicity on mechanical degradation of polyacrylamide-type flocculants Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-16 Hamid Alizadeh, Marek Pawlik
The effect of ultrasonication, screening and shearing on five polyacrylamide-based flocculants of similar molecular weight but different degrees of anionicity (DA) was studied through measurement of intrinsic viscosity ([]) and size exclusion chromatography (SEC) to investigate the influence of DA on the degradation of polymers. It was found that screening did not affect the [] of the polymers while
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B2O3-reinforced ablative materials with superior and comprehensive ablation resistance used in aerospace propulsion thermal protection systems Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-16 MengFei Guo, KaiXuan Yu, JiaPei Yang, Pan Zhang, YanChao Zhang, DuanXu Zhu
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A multifunctional cellulose paper with excellent flame retardancy, hydrophobicity and oil/water-separation performance via reaction with ammonium phytate and poly(methylhydrosiloxane) Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-15 Tinghao Wu, Yingqi Gu, Dong Zhao, Guodong Jiang, Tingwei Wang, Yucai Shen
Paper-based materials have become increasingly prevalent in the packaging and daily life. However, paper is flammable and hydrophilic, hindering its widespread application. Here, a novel reactive flame retardant of m-xylylenediamine phytate ammonium (MPAP) was prepared. Cellulose paper with superior flame-retardant and hydrophobic properties was successfully prepared by surface spraying technology
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Optimal processing conditions of a bio-based epoxy synthesized from vanillyl alcohol Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-12 S. Zaidi, S. Thakur, D. Sanchez-Rodriguez, R. Verdejo, J. Farjas, J. Costa
This work provides a comprehensive thermomechanical and rheological characterization of a high-performance epoxy resin synthesized from a vanillin derivative, vanillyl alcohol. The study includes a complete analysis of the curing and decomposition kinetics that enabled a Time-Temperature-Transformation plot accounting for gelation, vitrification, and resin degradation to be developed. These plots allow
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Tracing the antioxidant effect of vitamin E on ultra-high molecular weight polyethylene Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-12 Manli Lu, Jing Wang, Wenli Zhang, Weihua Liu, Mouhua Wang
The antioxidant effect of vitamin E on ultra-high molecular weight polyethylene (UHMWPE) during radiation oxidation and post-irradiation oxidation process was investigated using electron paramagnetic resonance spectroscopy (EPR) and fourier transform infrared microscopy (FTIR). EPR results showed that the free radical concentration of UHMWPE induced by γ-rays irradiation decreased with increasing vitamin
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Fabrication of flame retardant poly(methyl methacrylate) with excellent comprehensive properties based on a new phosphorus-silicon-nitrogen-synergistic system Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-11 Wenzong Xu, Yaocheng Zhou, Ziwei Bian, Ziyi Xuan, Shiyuan Yu
In general, the addition of phosphate ester flame retardants can improve the flame retardancy of polymethyl methacrylate (PMMA), but the flame retardant efficiency is low when phosphate ester is used alone and the tensile strength and hardness of the material are reduced. It is a challenge to improve the flame retardancy of PMMA while maintaining its inherent mechanical properties. In this study, a
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Coumarin-DPPO a new bio-based phosphorus additive for poly(lactic acid): Processing and flame retardant application Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-11 Daniele Roncucci, Marie-Odile Augé, Sithiprumnea Dul, Jiuke Chen, Ali Gooneie, Daniel Rentsch, Sandro Lehner, Milijana Jovic, Alexandra Rippl, Vanesa Ayala, Fanny Bonnet, Serge Bourbigot, Hansjörg Grützmacher, Gaëlle Fontaine, Sabyasachi Gaan
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Time domain NMR evaluation of thermal and thermochemical aging of nitrile rubber on crosslinking and mechanical properties Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-11 Naira Machado da Silva Ruiz, Ana Maria Furtado de Sousa, Mônica Regina da Costa Marques Calderari, Marco Antônio Gaya de Figueiredo, Aline Pinde Lima, Eduardo Ribeiro de Azevedo
This study investigates the impact of aging on nitrile rubber (NBR) compositions under thermal and thermochemical aging conditions. The effects of aging were assessed using the H Double Quantum Time Domain NMR (DQ-NMR) technique, providing molecular-scale insights into average cross-link density, spatial heterogeneity, and network inelastic defects. The aging's influence on the macroscopic mechanical
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Carbon fibers from polypropylene: Structural evolution of precursor fiber during stabilization and carbonization Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-11 Minghang Yang, Yu Deng, Qiongxia Liu, Cheng Liu, Jian Xu, Xigao Jian, Yousi Chen
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Study of the surface, rheological and morphological characteristics of isotactic polypropylene microplastics aged in a photothermal oxidation chamber Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-11 Gustavo Reis Martins, Elton Jorge da Rocha Rodrigues, Roberto Pinto Cucinelli Neto, Maria Inês Bruno Tavares
The aim of this study was to investigate, in addition to degradation processes, the rheological, crystalline, and molecular dynamics changes in isotactic polypropylene microplastics with average sizes of 0.5 and 2 mm, aged in a photothermal oxidation chamber for 166 days. In addition to commonly used techniques in microplastics research, time-domain nuclear magnetic resonance (TD-NMR) in fast field
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Theoretical study on the effect of oxidation states of phosphorus flame retardants on their mode of action Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-07 Chunlan Qin, Jie Chen, Shanshan Ruan, Fuyi Liu, Lidong Zhang
Polymers are ubiquitous and find applications in various facets of daily life and industrial production. However, the fire incidents induced by polymers jeopardize the safety of human life and property. Improving the fire resistance of polymeric materials through halogen-free flame retardants has become a prominent direction guided by the regulatory framework. In this paper, the decomposition pathways
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Progression from graphene and graphene oxide to high-performance epoxy resin-based composite Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-06 Qiguo Hao, Shuang Liu, Xiaomei Wang, Pengyu Zhang, Zhiyi Mao, Xu Zhang
Graphene (G) and graphene oxide (GO) possess a substantial specific surface area, excellent thermal conductivity, and remarkable mechanical strength. Integration with epoxy resin (EP) materials significantly enhances the performance of resin-based composites. EP, widely employed for its outstanding corrosion resistance, minimal shrinkage, and thermal stability, faces limitations due to inherent brittleness
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Multi-network PVA/SA aerogel fiber: Unveiling superior mechanical, thermal insulation, and extreme condition stability Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-06 Zijian Bai, Jianyu Jiang, Haotong Zhu, Dongnan Zhang, Hong Zhang, Yue Yu, Fengyu Quan
Aerogels are highly sought-after in thermal insulation textiles due to their exceptional porosity and low density. However, Current research on aerogels mainly centers on their fixed two- and three-dimensional structures, lacking design flexibility, which significantly restricts their practicality. In contrast, one-dimensional aerogel fibers, while offering design flexibility, face complex fabrication
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Synthesis, characterization and seawater biodegradability of paramylon mix ester derivatives with different DS Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-06 Ruiqi Li, Jin Ho Seok, Tadahisa Iwata
A two-step synthesis method was established to prepare paramylon mix ester derivatives with low total DS by introducing long chain hexanoate into biodegradable polysaccharide esters with short chain acetate. The relationship between the chemical structure of paramylon mix esters and their thermal properties and seawater biodegradability was investigated. Among the possible hydroxyl groups of paramylon
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Green preparation of poly (butylene succinate-co-butylene terephthalate) foam with tunable degradability and mechanical properties by supercritical CO2 Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-06 Shaolong Wei, Jianghao Xie, Jiaming Zhang, Ling Zhao, Dongdong Hu
Poly (butylene succinate-butylene terephthalate) (PBST) with different chain segments was synthesized by in-situ polycondensation, and foams were prepared by supercritical CO foaming. The crystallinity and tensile modulus of PBST increases with the aromatic content, slowing down the diffusion of CO and enhancing the dimensional stability of PBST foam. The rheological analysis reveals that a higher
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Reduced graphene oxide decorated two-dimensional FeSiCr nanosheets for improving flame-retardancy, electromagnetic wave absorption, and thermal conduction of ethylene vinyl acetate composites Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-05 Siyi Xu, Danyi Li, Wenrui Wang, Lin Lin, Ying Sun, Jihao Li, Linfan Li
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Theoretical insights into chemical recycling of polyethylene terephthalate (PET) Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-03-05 Stuart Conroy, Xiaolei Zhang
Polyethylene Terephthalate (PET) is one of the most commonly used plastics. Currently, PET waste has been mainly recycled through mechanical methods and alternative effective ways have emerged, such as chemical recycling including ammonolysis, aminolysis, hydrolysis, alcoholysis and glycolysis. However, a precise understanding of the reaction mechanisms and kinetics of these methods is lacking. This
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Non-phosphorus Glucosyl Schiff bases for smoke inhibition and mechanical enhancement of epoxy resin composites Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-28 Xiangnan Zhang, Ting Bai, Pengcheng Zhou, Jing Yan, Bin Yu, Siqi Huo, Junjie Wang
To improve the poor thermal stability of glucose, three glucose-based Schiff bases, named CG, SiG and UG, were synthesized as flame retardants for epoxy resin (EP) through the condensation reaction between glucose and three -NH containing substances, i.e. chitosan, 3-aminopropyltriethoxysilane and metal organic framework material (UIO-66-NH), respectively. Subsequently, three flame retardant-modified
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Enhancing flame retardancy and hydrolysis resistance of flame retardant copolyester fibers by reactive carbodiimide Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-28 JiaWei Ren, Chao Zeng, ShengMing Zhang, JinLong Xu, HuiShuang Tian, Peng Ji, ChaoSheng Wang, HuaPing Wang
Polyethylene terephthalate flame retardant copolyester (FRPET) copolymerized with 2-carboxyethyl (phenyl) phosphinic acid (CEPPA) is one of the major copolymerized commercial flame-retardant copolyesters. Similar to conventional PET fibers, the mechanical and flame retardant properties of FRPET fibers after alkaline water post-treatment are reduced. In this work, two kinds of carbodiimide-based masterbatches
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Towards effective recycling routes for polypropylene: Influence of a repair additive on flow characteristics and processability Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-27 Giulia Bernagozzi, Rossella Arrigo, Giuseppe Ponzielli, Alberto Frache
Plastic recycling is a key aspect to achieve effective polymer circularity, especially for polyolefins for which usually the mechanical recycling is considered a downcycling process. This downcycling phenomenon arises from the progressive deterioration of the polymer microstructure during reprocessing, resulting in a gradual loss of processability and properties, ultimately compromising the possibility
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A novel phosphorus/nitrogen-containing polyacrylonitrile fiber with excellent flame retardancy and mechanical properties Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-27 Li Wang, Lixiao Gao, Chunlong Zuo, Wei Tan, Yuanlin Ren, Xiaohui Liu
To improve the flame retardancy, smoke suppression and mechanical properties of polyacrylonitrile (PAN) fiber, it was first modified with diethylenetriamine to prepare the aminated PAN fiber (A-PAN). Second, diethyl phosphite (DEP) was grafted onto the A-PAN to fabricate flame retardant PAN fiber (DEP-A-PAN). XPS and FTIR analysis confirmed that phosphorus and nitrogen elements were covalently bonded
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Ozone resistance of three natural antioxidants in solution polymerized styrene-butadiene rubber—Molecular simulation and experimental study Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-23 Mingyuan Zhao, Caiwei Zhao, Changfeng Han, Xiuying zhao, Youping Wu
Rubbers containing a high number of unsaturated units face significant challenges due to ozone aging. In industrial production, p-phenylenediamines are commonly used as synthetic antiozonants to protect against ozone degradation. However, their potential adverse effects on human health and the environment are gradually being recognized. Experimentally selecting antioxidants is costly and subject to
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The catalytic pyrolysis of waste polyolefins by zeolite-based catalysts: A critical review on the structure-acidity synergies of catalysts Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-22 Ge Yang, Peng Peng, Hailing Guo, Hongwei Song, Zhibo Li
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Flame retardant behavior of bio-based epoxy resin bearing pyridazinone and dynamic ester bond via self-blow-out and vesicular carbon formation Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-21 Qi Cao, Jiahui Li, Qianqian Fan, Beitao Liu, Yan Kou, Xigao Jian, Zhihuan Weng
Aromatic nitrogen heterocyclic structure is a key building block of high-performance polymer materials and nitrogen-doped porous carbons, yet systematic studies on its flame-retardant effects and carbonization mechanisms in thermoset materials is still lacking. Here, a pyridazinone embedded bio-based epoxy resin (CSPZ-EP) cured by 4,4ʹ-methylenedianiline (DDM) was prepared. Benefiting from the rigid
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Radical scavenging and processing stability of novel biobased stabilizers in polypropylene Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-18 Katrin Markus, Elke Metzsch-Zilligen, Rudolf Pfaendner
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Ultrafast and selective chemical recycling of PLA to methyl lactate by using MHMDS as simple catalysts Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-17 Qiuyang Liu, Rulin Yang, Bingzhe Dong, Hongguang Sun, Guangqiang Xu, Qinggang Wang
The depolymerization of waste plastics into high-value products is a promising solution to address the plastic crisis. Among this field, catalytic activity and selectivity of depolymerization catalyst are of great concerns. Accordingly, in this work, a simple catalytic system was explored in detail to achieve the fast and selective chemical recycling of PLA into methyl lactate. Using commercially available
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Impact of thermomechanical reprocessing on multilayer plastic packaging blend Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-17 Ke Zhan, Daniel Meadows, Lindsay Levy, Raymond Hou, Tanmay Rahman, Virginia Davis, Edward Davis, Bryan S. Beckingham, Brian Via, Thomas Elder, Yucheng Peng
Multilayer plastic packaging (MPP) has attracted extensive attention due to its functionality and inherent difficulty in reclamation. One primary concern is the performance of reprocessed MPP since it inherently consists of many dissimilar polymers. This study aims to assess the effect of multiple thermomechanical reprocessing cycles on the properties of a MPP blend. Low density polyethylene (LDPE)/maleic
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Degradation processes in polyolefins with phenolic stabilizers subjected to ionizing or non-ionizing radiation Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-17 Miroslav Šlouf, Veronika Gajdošová, Ivana Šloufová, Miroslava Lukešová, Danuše Michálková, Michael Thomas Müller, Jan Pilař
We investigated degradation processes in polymer plaques made of polyolefin (HDPE or UHMWPE or COC) prepared by melt-mixing with or without phenolic stabilizer (natural α-tocopherol or synthetic Irganox®1010) and spin trapping agent (TTBNB; 2,4,6-Tri‑tert-butylnitrosobenzene). The degradation was initiated either by (wavelengths corresponding to terrestrial range of solar UV radiation) or (electrons
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Influence of two-phase structure of PET/PPSU alloys and selective distribution of flame retardants on the flame retardancy of polymer alloys Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-16 Kaixuan Feng, Haoyu Liu, Fei Xin, Yu Chen, Lijun Qian, Jiayue Hu
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Microparticle-aggregation effect of intumescent flame retardants on flame retardancy and toughening property of polypropylene Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-16 Shanzhe Li, Lijun Qian, Wei Tang, Yong Qiu, Jingyu Wang, Wang Xi, Yajun Chen, Xiao Wu
It is a widespread problem that loading intumescent flame retardant (IFR) into polypropylene (PP) always sacrificed the mechanical properties significantly. To develop PP composites with high flame retardancy and toughness, a new intumescent flame retardant (TAIC-IFR) with microparticle-aggregation structure was synthesized by a straightforward in-situ cemented method. Through its microparticle-aggregation
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Unleashing the potential of Boratrane and Silatrane: A game-changing approach for enhanced boron- and silicon- incorporation in phenol-formaldehyde resins and their thermal stability Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-16 Sakollapath Pithakratanayothin, Thanyalak Chaisuwan, Ruangdaj Tongsri, Eumporn Buarod, Warangkana Anuchitolar, Thanyaporn Yotkaew, Prathompoom Newyawong
In this study, we present an innovative and cost-effective method for the preparation of phenolic resin (PR) containing boron and silicon (BPR and BSiPR) using boratrane and silatrane. Through a one-pot synthesis via a sol-gel process, 3BPR and 3B5SiPR are successfully synthesized, utilizing boratrane and silatrane as the sources of boron and silicon. Our results demonstrate the effective introduction
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The effects of UVC irradiation on the properties of thermoplastics Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-15 Hans de Brouwer, Nithish Anbuchezhian
The effect of UVC irradiation on plastics was investigated. This study first generates color and mechanical data on a large number of commercial plastics after irradiation. PP, HDPE and ABS undergo changes in color and mechanical properties. The effects are smaller for the other materials such as PC, PBT, PC/ABS, LDPE. Dark colors make the degradation processes less visible, but do not offer protection
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Effects of UVC irradiation on polystyrene for healthcare packaging: Study by FTIR and Raman spectroscopy with thermoluminescence Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-14 C. Boronat, V. Correcher, J. García-Guinea, J.C. Bravo-Yagüe