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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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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
Polyolefin plastics have become an integral part of human life, but the uncontrolled disposal of waste plastics has led to severe environmental pollution. Therefore, it is crucial to address this issue urgently. Zeolite-based catalysts, known for their exceptional catalytic activity and stability, have gained significant attention in research endeavors. Nevertheless, comparing the performance of different
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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
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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
Bio-based molecules show great research potential to achieve alternatives to petrochemically produced products. Therefore, biogenic stabilizers (vanillates, syringates and gallates) were prepared, which were subsequently characterized by various analytical methods. Nuclear magnetic resonance spectroscopy was used for structural elucidation. Thermal stability and thus suitability for polymer processing
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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 a 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
The uneven distribution of flame retardants TAD and the flame channel formed by continuous phase are the two main factors affecting the flame retardancy of polymer alloys. [Display omitted]
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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
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Evaluation of the effect of the number of methylene units in poly(ω-hydroxyalkanoate)s on their biodegradability Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-14 Toyokazu Tsutsuba, Yuta Sawanaka, Miwa Suzuki, Kana Inagaki, Kana Arai, Syusuke Okaniwa, Junko Torii, Yuya Tachibana, Ken-ichi Kasuya
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Plastic Pretreatment: The key for efficient enzymatic and biodegradation processes Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-13 Benedetta Ciuffi, Emiliano Fratini, Luca Rosi
In recent years, enzymatic degradation and biodegradation have attracted great interest in the recycling of plastic waste. Compared to other recycling techniques, they have numerous advantages such as mild reaction conditions both in terms of temperature and pressure and the prevention in the use of toxic solvents. The monomers formed during the degradation processes can result in chemicals with high
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Comparison of the performances and aging mechanisms of XLPE and EVA insulation during their thermal oxidative aging Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-13 Minzun Ji, Xavier Colin, Wenfeng Liu, Xiaohong Chi, Sarah Chatenet, Wei Wei
The thermal oxidation of low-density polyethylene and poly(ethylene-co-vinyl acetate) both cross-linked with triallyl isocyanurate (respectively denoted XLPE and EVA) was studied at 165°C in air by Fourier transform infrared (FTIR) spectroscopy, dielectric spectroscopy and uniaxial tension. Monitoring the carbonyl index throughout the exposure allowed showing that these two polymers have similar oxidation
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Experimental Study on the Thermal Decomposition of Epoxy/Anhydride Thermoset Matrix in Composite Insulator Core Rods Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-11 Zhiyu Wan, Dandan Zhang, Chao Gao, Ming Lu, Zhenbiao Li, Ziheng Huang, Yuwei You, Zehong Wang
Epoxy/anhydride thermoset matrix within composite insulator core rods may thermally decompose by temperature rise caused by partial discharge. The thermal decomposition characteristics of the epoxy/anhydride thermoset was analyzed using pyrolysis-gas chromatography-mass spectrometry (PY-GC-MS) from 200 to 1000°C, including the mechanisms of crosslinked network scission and the formation of gaseous
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Biodegradation of plastics in soil: The effect of water content Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-10 Selene Chinaglia, Ermes Esposito, Maurizio Tosin, Marco Pecchiari, Francesco Degli Innocenti
The intrinsic biodegradability of plastic materials is demonstrated in the laboratory in optimized environmental conditions so as not to hinder the growth and metabolism of microbes. In particular, the water content is maintained at a level deemed optimal for microbial growth. However, the availability of water in the environment is highly variable. Therefore, when the investigator's aim is to predict
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Synergistic flame retardant coatings for carbon fibre-reinforced polyamide 6 composites based on expandable graphite, red phosphorus, and magnesium oxide Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-10 Zsófia Kovács, Andrea Toldy
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Partial glycolytic depolymerisation of poly(ethylene terephthalate) (PET) in the solid state: Modelling the contribution of time and temperature Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-08 S.F. Llopis, E. Verdejo, O. Gil-Castell, A. Ribes-Greus
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The role of recycling in UV and thermal ageing of polypropylene block copolymer Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-08 Kalouda Grigoriadi, Merel Nooijens, Max M.C. Vanhouttem, Veronique Barthelemy, Benjamin Klemm, Arjen Boersma
While polypropylene (PP) copolymers containing small amounts of polyethylene are greatly used in automotive, packaging, healthcare and pipe applications an understanding on how their properties are affected with recycling and subsequent ageing is limited. This study involves a characterization of a PP block copolymer that has been recycled three times and has been subjected to thermal and UV ageing
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Physicochemical alterations on UV aged polymers leading to microplastics formation: A multi-tiered study of polyester, polycarbonate and polyamide Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-08 Nina Maria Ainali, Dimitrios N. Bikiaris, Dimitra A. Lambropoulou
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Physical ageing of polyurea elastomers upon water absorption: Molecular dynamics and microphase structures Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-05 Jiayao Song, Shuen Liang, Yixia Wang, Ningning Song, Chunrong Tian, Xiaolian Qiang, Qiang Tian, Keping Chen
The evolution of molecular dynamics and microstructures of polyurea (PUA) elastomers with different stoichiometric ratios upon water absorption process was investigated. Water absorption kinetic of PUA was studied using Fick's model, and water molecules interacted in the following sequence: free C=O > monodentate hydrogen-bonding C=O > bidentate hydrogen-bonding C=O. The utilization of dielectric relaxation
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The integration of civilian nitrocellulose in propellant with highly improved mechanical property and thermal stability, and study on its combustion behavior Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-04 Heng Gao, Ling Chen, Fengqiang Nan, Binbin Wang, Xiang Cao, Derong Meng, Weidong He
Developing binders for propellants with balanced mechanical and energy properties is important and challenging. Herein, high-viscosity civilian nitrocotton (CNC) was used as reinforcing binder to prepare CNC-based propellant by solvent method. The influence of viscosity and content of CNC on mechanical properties, thermal stability, and combustion performance of propellants was investigated. The plasticizing
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Stabilization of polyethylene with grape pomace extract: effect of natural oil content Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-30 Kata Takács, Emese Slezák, Emese Pregi, Dóra Plachi, Erika Vági, Dóra Tátraaljai, Béla Pukánszky
The winery waste of a white grape was extracted in two different ways to produce extracts, one containing the natural oil of the waste and one without it; the goal of the work was to determine the positive or negative influence of the natural oil content of the extract on its stabilization effect and efficiency. The polyphenol content of the extracts was moderate, but their DPPH assay proved their
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Fire-safe and mechanic-robust EP composites realized by cube-in-box hollow PBAs structure Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-01 Yajun Huang, Song He, Junling Wang, Shibin Nie
As one of promising engineering plastics, epoxy resin (EP) has been a hot spot in various areas. Nevertheless, the further usage of EP has been challenged by the notorious problem of serious fire hazard. Here, we have utilized the strategies of epitaxial deposition and chemical transformation, acquiring the unique PBAs composites (Ni/Fe PBAs, Ni/Fe/Ni PBAs) and cube-in-box hollow PBAs structure (Ni/V/Ni
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Flame retardancy in isotactic polypropylene modified with crystalline coordination polymers based on calcium, zinc or aluminum dimethyl phosphates Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-02-01 Mateusz Kullas, Maciej Dębowski, Krystyna Czaja
A novel variety of metal organophosphates (MOPs) coordination polymers: calcium bis(dimethyl phosphate) (CaDMP), zinc bis(dimethyl phosphate) (ZnDMP) and aluminum tris(dimethyl phosphate) was examined for the first time to act as potential flame retardants in isotactic polypropylene (iPP) materials and their flame-retarding activity compared with widely used commercial flame retarder ammonium polyphosphate
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Connecting Radiation-Driven Changes in Structural, Thermal, and Mechanical Properties in Several Medical Device Polymers Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-28 Md Kamrul Hasan, David Staack, Suresh D. Pillai, Leonard S. Fifield, Matt Pharr
Stemming from security threats and shortages in supply, a recent push has emerged to expand alternatives to radioisotope Cobalt-60 gamma radiation for sterilization of polymeric medical products, including electron beam (E-beam) and X-ray machine-based sources. However, before large-scale implementation, the effects of these non-isotope-based methods must be thoroughly investigated from several perspectives
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Investigation on discoloration mechanism of cyclic olefin copolymer under ionizing irradiation sterilization Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-28 Fan Zhang, Xuanzhi Mao, Heng Lei, Feng Guo, Rongfang Shen, Zhe Xing, Guozhong Wu
Cyclic olefin copolymer (COC) is a material used in various aspects of medical and health fields due to its excellent comprehensive properties. When sterilized by ionizing irradiation, COC is typically exposed to an absorbed dose <25 kGy, yet noticeable discoloration still occurs. In this study, the COC with norbornene content of 52 mol.% was taken as the research subject to investigate the discoloration
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Improving the flame retardancy and water resistance of polypropylene by introducing microcapsule flame retardant system and modified zinc oxide Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-26 Mike Deng, Zhihao Zhang, Jun Sun, Xiaodong Liu, Hongfei Li, Xiaoyu Gu, Sheng Zhang
Intumescent flame retardant (IFR) and zinc oxide (ZnO) were successfully microencapsulated by polysiloxane, resulting in the preparation of Si-IFR and Si-ZnO, respectively. These microencapsulated additives were then incorporated into polypropylene (PP), leading to a synergistic enhancement of the flame retardancy, mechanical properties, and water resistance. By means of limiting oxygen index (LOI)
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Improving the flame retardancy and smoke suppression of ethylene vinyl acetate composites by introducing the hybrid material of Zn/TiO2@AKaol Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-26 Wufei Tang, Huimin Zhang, Ting Liu, Xinle Li, Hua Yang, Weizhen Huang, Yunhui Liao, Xiaoyu Gu, Sheng Zhang
Ethylene vinyl acetate copolymer (EVA) is widely applied in many important fields, but its broader utility is impeded by its flammability. To address this problem, the pre-acidified kaolinite (AKaol) by sulfuric acid was further dealt with TiO2 loading and Zn2+ doping to obtain Zn/TiO2@AKaol to improve the flame retardancy and smoke suppression of EVA composites containing intumescent flame retardants
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Effect of natural weathering on optical properties of transparent wood composite Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-26 Priya Bisht, Harish C. Barshilia, Krishna K. Pandey
Transparent wood composite (TWC) is an innovative wood-based polymeric material prepared by the impregnation of a suitable polymer into the lignin-modified wood substrate. TWC has gained significant attention for several outdoor applications including transparent wood smart windows, substrate for solar cells, light management devices and energy-efficient building materials. However, the interaction
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Thermo-responsive properties of self-healable thermosets based on epoxidized soybean oil Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-26 Agnieszka Tercjak, Joseba Gomez-Hermoso-de-Mendoza, Facundo Altuna, Junkal Gutierrez
In this work, epoxidized soybean oil (ESO) based thermosetting materials cured with citric acid (CA) and modified with low molecular weight 4′-(hexyloxy)-4-biphenyl-carbonitrile (HOBC) nematic liquid crystal were synthesised and characterized. In order to find adequate curing conditions, the non-isothermal differential scanning calorimetry (DSC) was performed and the formation of thermosetting systems
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Sandwich-structure inspired super-tough and fire-resistant plywood containing vinyl acetate-ethylene based adhesive reinforced by melamine amino trimethyl phosphate and sodium lignosulfonate Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-24 Jinhan Lu, Xuan Sun, Zhilin Chen, Peng Jiang, Luming Li, Maohai Wang
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A biphosphophenanthrene structure intumescent flame retardant with superior smoke suppression performance for epoxy resin Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-24 Ni Kang, Xulong Ma, Yonghang Zhang, Ou Zhao, Yang Min, Wei Zhao, Daming Ban
The intrinsic flammability and high smoke production are two major defects that epoxy resin (EP) must overcome during the practical application. However, few current studies have acknowledged in both fire resistance and smoke suppression performance, which is vitally interrelated with quality of char layers. Herein, a P/S-containing compounds (PODSE) was prepared via esterification and then supplemented
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Factors affecting the ageing of polymer composite: A state of art Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-20 Ayushi Gupta, Narendra Kumar, Anish Sachdeva
Polymer composites have become indispensable in modern engineering applications, presenting a unique blend of qualities, including lightweight design, high strength, and corrosion resistance. Despite the inherent strength of these materials, their sustained performance is intricately linked to the various factors influencing the ageing process. It delves into the realms of general degradation, the
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LIPSS pattern induced by polymer surface instability for myoblast cell guidance Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-20 Nikola Slepičková Kasálková, Veronika Juřicová, Silvie Rimpelová, Dominik Fajstavr, Bára Frýdlová, Zdeňka Kolská, Václav Švorčík, Petr Slepička
The presented study highlights the efficiency of employing a KrF excimer laser to create diverse types of periodic nanostructures (LIPSS – laser induced periodic surface structures) on polyether ether ketone (PEEK) and polyethylene naphthalate (PEN) substrates. LIPSS structures are very important both in tissue engineering and find also strong application in the field of sensor construction, and SERS
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Effect of nanoparticles and siloxane groups on the atomic oxygen erosion resistance of copolyimides Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-18 Ulyana S. Andropova, Vladimir N. Chernik, Lev S. Novikov, Dmitriy A. Sapozhnikov, Nadezhda A. Tebeneva, Rinat R. Aysin, Olga A. Serenko
The properties, resistance to atomic oxygen (AO) in particular, of copolyimides based on 4,4′-(9-fluorenylidene)dianiline, 3,3′,4,4′-diphenyloxide tetracarboxylic acid and hexamethylenediamine (PI-1), 4,4′-(9-fluorenylidene)dianiline, 3,3′,4,4′-tetracarboxylic acid diphenyloxide and 1,3-Bis-(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane (PI-2) were studied. Tris-(methyldiethoxysiloxy)gallium and te
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Synthesis of a novel dimethylglyoxime-bridged phosphinate and its application in flame-retardant epoxy resins Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-14 Jun-Chao Shi, Wei-Bin Bai, Yu-Cai Lin, Fu-Chuan Ding, Rong-Kun Jian
Considering the need for flame retardancy in epoxy resin (EP), a novel dimethylglyoxime-bridged phosphinate (DMG-DC) has been suggested and applied for the purpose of flame-retardant modification of epoxy resin. As a result of the substitution reaction between dimethylglyoxime (DMG) and diphenylphosphoryl chloride (DPPC), DMG-DC was successfully characterized chemically. The research has demonstrated
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Degradable, intrinsically flame-retardant, low-water-absorbing vanillin-derived epoxy thermoset with a Schiff base structure Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-17 Cong Yang, Xinnian Xia, Yale Xiao, Guoqing Wei, Wensheng Li, Yanbing Lu
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Synthesis of MXene-Based Functional Coatings on Rigid Polyurethane Foam Surfaces: A Comparative Study of Layer-by-Layer Self-Assembly and Hydrothermal Methods Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-14 Jiaxin Li, Fan Xia, Ya Liu, Jianhua Wang, Xuping Su, Zhiwei Li, Haoping Peng
A flame retardant for rigid polyurethane (RPUF) was designed and synthesized to expand the application field of RPUF. The flame retardants, namely MXene/PEI/PA-L and MXene/PEI/PA-H, were synthesized using phytic acid (PA), polyethyleneimine (PEI), and MXene through layer-by-layer (LBL) self-assembly method and hydrothermal method, respectively. In terms of mechanical performance, MXene/PEI/PA-L imparted
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Organic copper phosphate-decorated layered double hydroxide to enhance the flame retardancy and smoke suppression of epoxy resin Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-13 Xiao-Hui Shi, Hong Shi, Wei-Min Xie, Qing-Yun Liu, Shi-Jie Wu, De-Yi Wang
It is essential to endow epoxy resin (EP) with high fire safety and mechanical properties due to its extensive application. In light of the flame-retardant efficiency and facile agglomeration of layered double hydroxide within polymers, surfactant-intercalated LDH decorated with organic copper phosphate (LDH@ATMP-Cu) was developed via electrostatic assembly. The EP composites containing 3 wt% resultant
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Interaction between radio-oxidized polypropylene and gaseous HCl. Part 1. Qualitative evidence Polym. Degrad. Stabil. (IF 5.9) Pub Date : 2024-01-15 Jing Huang, Floriane Carpentier, Frédéric Miserque, Muriel Ferry, Stéphane Esnouf
Polymers are widely used in various sectors of the nuclear industry where they can become contaminated with fission and activation products. The resulting nuclear wastes consist in a mixture of different polymers, which may be classified as long-lived intermediate-level waste (LL-ILW) if they have been in contact with long-lived radionuclides. From their production, polymers will be radio-oxidized