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You searched for: Journal Polymer degradation and stability Remove constraint Journal: Polymer degradation and stability Publication Year 2021 Remove constraint Publication Year: 2021 Source 2021 v.183 Remove constraint Source: 2021 v.183
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1. Aging behaviors of trans-1, 4-poly (isoprene-co-butadiene) copolymer rubber

Author:
Li, Ning; Zong, Xin; Li, Hongyu; He, Aihua; Zhang, Xinping
Source:
Polymer degradation and stability 2021 v.183 pp. 109456
ISSN:
0141-3910
Subject:
abrasion resistance; composite polymers; compression molding; degradation; modulus of elasticity; oxidation; rubber; viscosity
Abstract:
... Trans-1, 4-poly (butadiene-co-isoprene) (TBIR) displays high trans-1, 4-configuration (>90%) and gradient multi-block chain structure with varied length of trans-1, 4-polyisoprene (TPI) blocks and is expected to be used in high-performance “green” rubber composites owing to excellent dynamic properties. However, the aging behavior of TBIR in comparison with other general rubbers are not clear. In ...
DOI:
10.1016/j.polymdegradstab.2020.109456

2. A new class of catalysts for the glycolysis of PET: Deep eutectic solvent@ZIF-8 composite

Author:
Wang, Rui; Wang, Tianlin; Yu, Guangren; Chen, Xiaochun
Source:
Polymer degradation and stability 2021 v.183 pp. 109463
ISSN:
0141-3910
Subject:
catalysts; catalytic activity; degradation; energy; ethylene glycol; filtration; glycolysis; polymers
Abstract:
... As an excellent catalyst, DES has been used in PET degradation reaction, but its recovery is currently achieved by evaporating a large amount of solvent,which will undoubtedly consume a lot of energy. In this study, we combined DES and ZIF, and synthesized composites of DES@ZIF-8, in which DES was synthesized using acetamide and different metal salts. Then the effects of experimental parameters on ...
DOI:
10.1016/j.polymdegradstab.2020.109463

3. A novel DOPO-based flame retardant containing benzimidazolone structure with high charring ability towards low flammability and smoke epoxy resins

Author:
Wang, Hao; Li, Shan; Zhu, Zongmin; Yin, Xianze; Wang, Luoxin; Weng, Yunxuan; Wang, Xuyi
Source:
Polymer degradation and stability 2021 v.183 pp. 109426
ISSN:
0141-3910
Subject:
X-ray photoelectron spectroscopy; combustion; degradation; epoxides; fire behavior; flame retardants; flammability; free radicals; heat; oxygen; phosphorus content; polymers; smoke; thermal stability
Abstract:
... A novel flame retardant POBDBI was generated by the reaction of p-dibenzaldehyde, 5-amino-2-benzimidazolinone and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), and employed to epoxy resin. The structure of POBDBI was measured by FT-IR and NMR tests. Then flame-retardant EP was fabricated by using POBDBI as a flame-retardant. The thermal stability, flame-retardant performance and fire ...
DOI:
10.1016/j.polymdegradstab.2020.109426

4. A novel poly(3-hydroxybutyrate)-degrading actinobacterium that was isolated from plastisphere formed on marine plastic debris

Author:
Suzuki, Miwa; Tachibana, Yuya; Takizawa, Reika; Morikawa, Takuya; Takeno, Hiroyuki; Kasuya, Ken-ichi
Source:
Polymer degradation and stability 2021 v.183 pp. 109461
ISSN:
0141-3910
Subject:
Japan; Nocardioides; biofilm; carbon; degradation; genome; metagenomics; microbial communities; polypropylenes; temperature
Abstract:
... Plastic debris surfaces in marine environments provide novel habitats for marine microbes. This type of microbial community is known as a “plastisphere”. Prior metagenomic analyses of plastispheres suggest that the surface of marine plastic debris contain plastic-degrading microbes. Here, we focus on plastisphere as a microbial source. We isolated strain OK12 from plastic bag debris collected from ...
DOI:
10.1016/j.polymdegradstab.2020.109461

5. Antibacterial activity, thermal behavior, mechanical properties and biodegradability of silver zeolite/poly(butylene succinate) composite films

Author:
Wattanawong, Nissapa; Aht-Ong, Duangdao
Source:
Polymer degradation and stability 2021 v.183 pp. 109459
ISSN:
0141-3910
Subject:
activation energy; antibacterial properties; biodegradability; biodegradation; extrusion; pyrolysis; silver; soil; solvents; succinic acid; thermal properties; thermogravimetry; zeolites
Abstract:
... In recent work, the antibacterial packaging film from biodegradable polymer was prepared. Poly(butylene succinate) (PBS) composite films containing three different antibacterial agents; silver zeolite A (AgZA), silver zeolite Y (AgZY) and silver zeolite ZSM-5 (AgZSM-5), at the concentration of 0.5–4%wt were produced by solvent casting and melt extrusion techniques. The effects of processing method ...
DOI:
10.1016/j.polymdegradstab.2020.109459

6. Assessment of the devulcanization process of EPDM waste from roofing systems by combined thermomechanical/microwave procedures

Author:
Colom, X.; Cañavate, J.; Formela, K.; Shadman, Alireza; Saeb, Mohammad Reza
Source:
Polymer degradation and stability 2021 v.183 pp. 109450
ISSN:
0141-3910
Subject:
degradation; polymers; rubber; temperature; wastes
Abstract:
... Ethylene-propylene-diene rubber (EPDM) is a elastomer widely used in common industrial applications. EPDM can be shaped into sheets and employed as isolating material for roofing systems. In this study, scraps of EPDM from commercial, industrial and residential roofing systems were treated by combined thermo-mechanical and microwave devulcanization processes including peroxide of benzoyl (BPO). Th ...
DOI:
10.1016/j.polymdegradstab.2020.109450

7. Assessment of transport kinetics and chemo-mechanical properties of GF/Epoxy composite under long term exposure to sulphuric acid

Author:
Padarthi, Y.; Mohanta, S.; Gupta, J.; Neogi, S.
Source:
Polymer degradation and stability 2021 v.183 pp. 109436
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; aqueous solutions; chronic exposure; corrosion; crosslinking; electrons; energy-dispersive X-ray analysis; epoxides; glass; physiological transport; polymers; sorption isotherms; storage modulus; sulfuric acid; thermal analysis
Abstract:
... Glass Fibre-Epoxy (GF/Epoxy) composites are being the choice of material when exposed to inorganic acids such as sulphuric acid due to its superior corrosion resistance properties. Water diffusion into GF/Epoxy composites is well-reported. However, inter-relation between acid diffusion mechanism and its analogous influence on chemo-mechanical properties is never investigated with greater details. ...
DOI:
10.1016/j.polymdegradstab.2020.109436

8. Biocompatible linear diamides derivative-nucleated biodegradable poly(ethylene succinate): Tailored crystallization kinetics, aggregated structure and thermal degradation

Author:
Zhou, Shanshan; Wei, Ziyu; Sun, Yongyan; Zhu, Zhe; Xie, Zhanghua; Ma, Huimin; Yin, Jing; Wang, Junsheng; Yang, Jinjun
Source:
Polymer degradation and stability 2021 v.183 pp. 109428
ISSN:
0141-3910
Subject:
amides; biodegradability; crystal structure; crystallization; hydrogen bonding; polyesters; temperature; thermal degradation; thermal stability
Abstract:
... A biocompatible linear organic nucleator (EBH) was incorporated into biodegradable linear aliphatic poly(ethylene succinate) (PES) polyester to investigate effect of EBH on crystallization kinetics, aggregated structure and thermal stability of PES. Crystallization kinetic results suggested that EBH enhanced significantly crystallization rate and decreased substantially crystallization time of PES ...
DOI:
10.1016/j.polymdegradstab.2020.109428

9. Blending alginate fibers with polyester fibers for flame-retardant filling materials: Thermal decomposition behaviors and fire performance

Author:
Li, Ping; Wang, Qian-Zhan; Wang, Bin; Liu, Yan-Yan; Xu, Ying-Jun; Liu, Yun; Zhu, Ping
Source:
Polymer degradation and stability 2021 v.183 pp. 109470
ISSN:
0141-3910
Subject:
alginates; calorimetry; furniture; heat; polyesters; smoke; thermal degradation; toxicity; vapors; weight loss; Pennsylvania
Abstract:
... Polyester fibers are often applied as filling materials; however, they are flammable and exhibit melt-dripping. In this work, to prepare fibers with high flame retardancy, inherently flame-retardant alginate fibers were blended with polyester fibers, without using any toxic chemicals. The blended fibers with 20 wt.% alginate fibers achieved quick self-extinguishing without any melt-dripping in the ...
DOI:
10.1016/j.polymdegradstab.2020.109470

10. Characterising plasticised cellulose acetate-based historic artefacts by NMR spectroscopy: A new approach for quantifying the degree of substitution and diethyl phthalate contents

Author:
Da Ros, Simoní; Aliev, Abil E.; del Gaudio, Isabella; King, Rose; Pokorska, Anna; Kearney, Mark; Curran, Katherine
Source:
Polymer degradation and stability 2021 v.183 pp. 109420
ISSN:
0141-3910
Subject:
cellulose; cellulose acetate; degradation; diethyl phthalate; infrared spectroscopy; museums; nuclear magnetic resonance spectroscopy; plasticizers; relative humidity; temperature
Abstract:
... As one of the first semi-synthetic plastics produced industrially, cellulose acetate (CA)-based artefacts represent valued items in museum collections and archives which, however, present stability issues. High temperature and relative humidity conditions have long been known to promote changes in CA properties, for instance, due to the deacetylation of CA polymer chains and the loss of plasticise ...
DOI:
10.1016/j.polymdegradstab.2020.109420

11. Characterization of degradation behavior of poly(glycerol maleate) films in various aqueous environments

Author:
Wang, Wei-Hsuan; Huang, Chieh-Wei; Tsou, Erh-Yeh; Ao-Ieong, Wei-Sam; Hsu, Hui-Ching; Wong, David Shan-Hill; Wang, Jane
Source:
Polymer degradation and stability 2021 v.183 pp. 109441
ISSN:
0141-3910
Subject:
biodegradability; degradation; freshwater; glycerol; maleates; pollution; reverse osmosis; salinity; seawater; tap water; water uptake
Abstract:
... Plastic pollution has become a serious environmental challenge, especially in the past two decades due to the ubiquitous use of plastics all over the world. To reduce plastic pollution, biodegradable polymers are in high demand as alternatives for common plastics. In this work, we study the degradability of poly(glycerol maleate)(PGM) in various aqueous environments to evaluate the influence of sa ...
DOI:
10.1016/j.polymdegradstab.2020.109441

12. Combination of in vitro thermally-accelerated ageing and Fourier-Transform Infrared spectroscopy to predict scaffold lifetime

Author:
Langueh, Credson; Changotade, Sylvie; Ramtani, Salah; Lutomski, Didier; Rohman, Géraldine
Source:
Polymer degradation and stability 2021 v.183 pp. 109454
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; activation energy; biodegradability; cell culture; chemical composition; crosslinking; culture media; degradation; durability; emulsions; gravimetry; polymers; prediction; temperature; tissues
Abstract:
... Biodegradable elastomers face a growing use in soft tissue engineering due to the possibility to tune, by an appropriate selection of the synthesis and process conditions, the material thermo-mechanical properties to match the stress–strain behavior of the tissue to replace. However, changes in material properties can impact drastically the scaffold durability and therefore the efficiency of tissu ...
DOI:
10.1016/j.polymdegradstab.2020.109454

13. Comparative DFT study of the effectiveness of p-phenylenediamine antioxidants through their coordination ability towards the late 1st row transition metals

Author:
Jelemenská, Ingrid; Breza, Martin
Source:
Polymer degradation and stability 2021 v.183 pp. 109438
ISSN:
0141-3910
Subject:
antioxidants; degradation; nitrogen; polymers
Abstract:
... Interaction energies, metal atom charges and electron density Laplacians at bond critical points of metal – nitrogen bonds in [Aox…M]²⁺ complexes of a series of p-phenylenediamine antioxidants (Aox) with the late 1ˢᵗ row transition metals M(II) in various spin states were evaluated in order to predict the antioxidant effectiveness through their coordination ability. The complexes without exclusive ...
DOI:
10.1016/j.polymdegradstab.2020.109438

14. Constitutive modeling of γ-irradiated silicone rubber foams under compression and shear loading

Author:
Jia, Dong; Yan, Shunping; Peng, Yunqiang; Wei, Liming; Wang, Luobin; Gao, Yang; Hao, Zhiming; Qiu, Yong; Wan, Qiang
Source:
Polymer degradation and stability 2021 v.183 pp. 109410
ISSN:
0141-3910
Subject:
ambient temperature; degradation; dose response; finite element analysis; irradiation; models; modulus of elasticity; prediction; rubber; shear stress; silicone
Abstract:
... Under the service conditions of nuclear engineering applications, silicone rubber foams should endure radiation of γ rays accompanied by compression and shear loading. In this paper, the Hyperfoam model is extended to characterize the mechanical behaviors of silicone rubber foams under γ-irradiation. After exposing silicone rubber foams to a wide radiation dose range from 0 to 500 kGy at room temp ...
DOI:
10.1016/j.polymdegradstab.2020.109410

15. Construction of nano-multilayer coatings on copolyester fabrics using UV-grafting mediated layer-by-layer self-assembly for improved anti-droplet and flame retardent performance

Author:
Rui, Wang; Wenqing, Wang; Fanghe, Wang; Anying, Zhang; Xiuqin, Zhang; Deyi, Wang
Source:
Polymer degradation and stability 2021 v.183 pp. 109405
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adhesion; calorimeters; combustion; degradation; energy-dispersive X-ray analysis; fire resistance; flame retardants; heat; oxygen; polyacrylic acid; polyesters; sodium; succinic acid; synergism; thermal stability; thermogravimetry
Abstract:
... Aiming to realize anti-dripping and improve fire retardancy of polyester fabrics, novel hybrid multilayer nano-coatings composed of γ-amino propyltriethoxysilane (KH-550), bio-based betadex sulfobutyl ether sodium (SBE-β-CD) and [(6-Oxido-6H-dibenz-[c,e][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid (DDP), were successfully constructed through layer-by-layer self assembly (LBL) method. Polyacryl ...
DOI:
10.1016/j.polymdegradstab.2020.109405

16. Defects in polylactide spherulites: Ring line cracks and micropores

Author:
Xuzhen, Zhang; Xin, Wen; Chenmeng, Zhou; Wenjian, Huang; Yong, Li
Source:
Polymer degradation and stability 2021 v.183 pp. 109416
ISSN:
0141-3910
Subject:
atomic force microscopy; biodegradability; brittleness; crystallization; degradation; micropores; molecular weight; polylactic acid; temperature
Abstract:
... Polylactide (PLA) is a representative material in biodegradable polymers, but its application is limited due to the brittleness and poor toughness. In order to investigate the basic brittleness mechanism of PLA, the morphology and formation of spherulite defects in PLA, including ring line cracks with width around 0.3 nm and micropores with diameters of 0.8–1.2 μm, were studied by polarizing micro ...
DOI:
10.1016/j.polymdegradstab.2020.109416

17. Effect of chain extender and light stabilizer on the weathering resistance of PBAT/PLA blend films prepared by extrusion blowing

Author:
Zhang, Ting; Han, Weiyao; Zhang, Caili; Weng, Yunxuan
Source:
Polymer degradation and stability 2021 v.183 pp. 109455
ISSN:
0141-3910
Subject:
biodegradability; crosslinking; degradation; extrusion; stabilizers; tensile strength
Abstract:
... Biodegradable poly (butylene adipate‑co‑terephthalate)/polylactic acid (PBAT/PLA) films were prepared by melt blending and blowing technology under the presence of a chain extender and two different light stabilizers. A comparison of the infrared spectra of the film with and without these additives before and after the weathering tests showed that the addition of chain extender and light stabilize ...
DOI:
10.1016/j.polymdegradstab.2020.109455

18. Effect of graphene nanoplatelets on the dielectric permittivity and segmental motions of electrospun poly(ethylene-co-vinyl alcohol) nanofibers

Author:
Badia, J.D.; Teruel-Juanes, R.; Echegoyen, Y.; Torres-Giner, S.; Lagarón, J.M.; Ribes-Greus, A.
Source:
Polymer degradation and stability 2021 v.183 pp. 109404
ISSN:
0141-3910
Subject:
alcohols; degradation; dielectric permittivity; ethylene; glass transition; glass transition temperature; models; nanocomposites; nanofibers; thermal analysis
Abstract:
... The influence of the addition of graphene nanoplatelets (GNPs) on the intra/inter – molecular segmental motions of poly(ethylene-co-vinyl alcohol) (EVOH) was assessed by means of dielectric thermal analysis (DETA). The relaxation spectra were studied in terms of the dielectric permittivity (ε′) and the dielectric loss tangent (tan δ) at wide ranges of frequency (from 10⁻² to 10⁷ Hz) and temperatur ...
DOI:
10.1016/j.polymdegradstab.2020.109404

19. Evolution of mechanical properties of aged poly(ether ketone ketone) explained by a microstructural approach

Author:
Roland, Sébastien; Moghaddam, Mahdi; Tencé-Girault, Sylvie; Fayolle, Bruno
Source:
Polymer degradation and stability 2021 v.183 pp. 109412
ISSN:
0141-3910
Subject:
X-radiation; cleavage (chemistry); degradation; evolution; gel chromatography; polymers
Abstract:
... In this work, the thermo-oxidative behavior of PEKK films (~50 µm thick) in solid state were investigated. Since the mechanical properties of PEKK samples, especially the strain at break, are clearly affected after long ageing time, the modifications of the PEKK structure have been monitored at the molecular and the macromolecular scales using different techniques such as gel permeation chromatogr ...
DOI:
10.1016/j.polymdegradstab.2020.109412

20. Experimental analysis and modeling of Buoyancy-driven flame spread on cast poly(methyl methacrylate) in corner configuration

Author:
Chaudhari, Dushyant M.; Fiola, Gregory J.; Stoliarov, Stanislav I.
Source:
Polymer degradation and stability 2021 v.183 pp. 109433
ISSN:
0141-3910
Subject:
empirical models; geometry; heat transfer; propane; pyrolysis; soot
Abstract:
... A new experimental setup was developed to study turbulent, buoyancy-driven flame spread on a corner wall. Two 146 × 50 × 0.58 cm panels of cast black poly(methyl methacrylate) (PMMA), whose pyrolysis properties were fully characterized in a separate study, were ignited using a triangular propane burner. The corner wall assembly was placed into a well-ventilated enclosure and heat release rate (HRR ...
DOI:
10.1016/j.polymdegradstab.2020.109433