Polymer Degradation and Stability最新文献

{"title":"Multifunctional reactive P-N flame retardant for enhanced flame retardancy, mechanical properties and fatigue resistance of EVA-based cable materials via interfacial compatibilization and regional melting refinement of organic-inorganic interface","authors":"Ping Wang ,&nbsp;Hongyu Tian ,&nbsp;Yiyang Zhou ,&nbsp;Tongtong Zhang ,&nbsp;Shi Dong ,&nbsp;Longen Cheng ,&nbsp;Wenbin Luo ,&nbsp;Li Yang ,&nbsp;Wenxiu Liu ,&nbsp;Tian Cao ,&nbsp;Mingdi Yang ,&nbsp;Daosheng Sun","doi":"10.1016/j.polymdegradstab.2025.111877","DOIUrl":"10.1016/j.polymdegradstab.2025.111877","url":null,"abstract":"<div><div>Developing high-performance composites for maglev train cables that combine excellent flame retardancy, mechanical properties and fatigue resistance is currently a significant challenge in special cable industry. Herein, a multifunctional reactive phosphorus nitrogen flame retardants (UPMDM) with flame retardant and filler surface modification functions was synthesized, and it was employed to control the polymer matrix-filler interactions and the microstructure of ethylene-vinyl acetate copolymer (EVA)-based composite during melt blending. Phosphorus-nitrogen composite flame retardant (MH@UPMDM) could be preformed before melt blending or formed in-situ during melt blending by the reaction between the isocyanate group (-NCO) of UPMDM and the hydroxyl group on the surface of magnesium hydroxide (MH), and the effect of processing type (physical blending/chemical grafting/in-situ reaction) on dispersion kinetics of MH in EVA matrix was investigated. The results indicate preformed MH@UPMDM can play a role in rigid crosslinkers to construct organic-inorganic hybrid network, thus effectively control the dispersion kinetics of the fillers and the filler-matrix interaction in the EVA matrix. Compared with EVA/MH composites, the elongation of EVA/MH@UPMDM composites is increased by nearly 2.2-fold, while it also exhibits an excellent fatigue-resistance under 1.0 × 10⁴th cycles. Furthermore, MH@UPMDM can significantly enhance the flame retardant properties of the composites, the limiting oxygen index (LOI) of EVA/MH@UPMDM composite reaches 33.6 %, while its peak heat release rate (PHRR) and total heat release (THR) decreases to 277.82 kW/m² and 74.71 MJ/m² from 436.66 kW/m² and 88.67 MJ/m² compared to EVA/MH composites, which may be attributed to the multi-phase synergistic flame retardant mechanism of UPMDM.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111877"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-mechanistic bio-based antioxidants constructed by polyphenol-thiourea-rare earth synergy on enhancing thermo-oxidative aging resistance of NBR","authors":"Shuangjiang He ,&nbsp;Zhong Zeng ,&nbsp;Wenbin Chen ,&nbsp;Xiao Xiao ,&nbsp;Ning An ,&nbsp;Youquan Ling ,&nbsp;Shuai Li ,&nbsp;Long Ni ,&nbsp;Xiaowen Zhao ,&nbsp;Mei Liang ,&nbsp;Yang Chen ,&nbsp;Huawei Zou","doi":"10.1016/j.polymdegradstab.2025.111872","DOIUrl":"10.1016/j.polymdegradstab.2025.111872","url":null,"abstract":"<div><div>To address the challenges encountered by conventional antioxidants, such as migration, toxicity, and single aging resistance mechanisms, which fail to meet the demands for high performance and sustainability. In this study, a series of multi-mechanistic bio-based antioxidants (PDTA-RE) featuring polyphenol-thiourea-rare earth synergy were designed through a sequential “polymerization-grafting-complexation” strategy. Then, the thermo-oxidative aging resistance of composites was evaluated via 121 °C accelerated aging tests, thermal analysis, and kinetic analysis of thermal-oxidative decomposition. Following 120 h of aging, the PDTASc/NBR composites exhibited a tensile strength retention rate of 93.63% and an aging coefficient (<em>K</em>) of 0.61, which were 79.85% and 258.82% higher than those of Neat/NBR, respectively, while superior to commercial antioxidants. Moreover, polyphenolic groups scavenge free radicals, thiourea mercapto decompose hydroperoxides, and rare earth ions trap residual radicals. Additionally, the polymerized framework and double bond anchoring endowed PDTA-RE with excellent anti-migration ability, avoiding high-temperature efficacy loss.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111872"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"When PET meets phosphorus flame retardants: A ReaxFF molecular dynamics study","authors":"Jiuke Chen ,&nbsp;Sabyasachi Gaan ,&nbsp;Manfred Heuberger ,&nbsp;Ali Gooneie","doi":"10.1016/j.polymdegradstab.2025.111876","DOIUrl":"10.1016/j.polymdegradstab.2025.111876","url":null,"abstract":"<div><div>Phosphorus-based flame retardants (P-FRs) are widely recognized as effective halogen-free additives for flammable thermoplastics, such as polyethylene terephthalate (PET), offering both strong flame resistance and relatively low toxicity. Due to its broad applications, it is crucial to pin down the degradation behavior of PET in the presence of P-FRs to enhance fire safety and polymer circularity. During conventional mechanical recycling, the underlying chemistry in the PET/P-FR materials may cause adverse reactions, leading to deteriorated mechanical properties of recycled products. This study employed reactive molecular dynamics (ReaxFF-MD) simulations based on reactive force field (ReaxFF) to explore the degradation of the PET containing two model P-FRs, specifically DOPO-PEPA (DP) and Aflammit PCO 900 (AF), at elevated temperatures. The predicted thermal behavior of PET was validated against experimental data, and the degradation mechanisms of PET were scrutinized through the analysis of degradation products, bonding evolution, and extensive trajectory analysis. The theoretically predicted thermal decomposition mechanisms of P-FRs were successfully verified by experiment, which is also consistent with existing research. Compared with DP, the molecule AF shows a retarded decomposition during the heat-up before a rapid fragmentation occurs, which can be attributed to its low-energy chair conformation; DP decomposes earlier due to the weaker C<img>O bond linkage and availability of protons via hydrogen abstraction. Our ReaxFF-MD simulations are based on quantum mechanical calculations and allow for an explicit investigation of the interactions between PET and P-FRs by including polymeric chains and additives in the same simulation. The reactions involving phosphorus species in the PET/P-FR were identified; notably DP fragment that can combine with the polymeric chain-end, as well as gasification effects from AF, which together aids in the comprehensive understanding of their different modes of action. In addition to the temperature effects, the oxidative conditions were included in this study to determine the thermo-oxidative degradation behavior. In this study, ReaxFF-MD simulations provide valuable insights into how thermal and thermo-oxidative degradation pathways evolve and control the fragmentation of PET and PET/P-FR systems. This methodology is proposed as a foundation for future research aimed at understanding complex reaction networks and improving the recycling quality of PET/P-FR materials.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111876"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated electromagnetic shielding and flame retardancy in coated fabrics through synergistic NiZnFe2O4@MnO2/graphene aerogel and APP","authors":"Peiyong Ren ,&nbsp;Xiaori Yang ,&nbsp;Ziyu Wang ,&nbsp;Jinwei Yang ,&nbsp;Xiaoping Gao ,&nbsp;Xin Jiang","doi":"10.1016/j.polymdegradstab.2025.111859","DOIUrl":"10.1016/j.polymdegradstab.2025.111859","url":null,"abstract":"<div><div>With the rapid development of communication technologies, the demand for multifunctional textiles with both electromagnetic interference (EMI) shielding and flame retardancy has intensified. In this study, a graphene-based composite aerogel doped with NiZnFe₂O₄@MnO₂ core-shell microspheres (NiZnFe₂O₄@MnO₂/GA) was synthesized via hydrothermal reduction and subsequently integrated with ammonium polyphosphate (APP) into a waterborne polyurethane (WPU) matrix, which was coated onto aramid/stainless-steel textiles to produce a multifunctional fabric. Interfacial bonding was strengthened through chemical crosslinking, providing a structural basis for the integrated electromagnetic and thermal functions. The EMI shielding and flame-retardant performances of the coated fabrics were systematically evaluated to clarify their synergistic enhancement mechanisms. The three-dimensional (3D) conductive-magnetic network of the NiZnFe₂O₄@MnO₂/GA heterostructure induced strong interfacial polarization losses, achieving a total shielding effectiveness (SE_T) of 44.5 dB at only 2 wt% loading with a 77 % absorption contribution. Meanwhile, the synergy between NiZnFe₂O₄@MnO₂/GA and APP produced a dual flame-retardant mechanism by stabilizing the char layer and diluting flammable gases. The peak heat release rate (pHRR), total heat release (THR), total smoke production (TSP), and peak CO production (pCO) were reduced by 45.9 %, 53.9 %, 48.1 %, and 85.2 %, respectively, compared with pure WPU-coated fabrics. These findings provide a viable strategy for designing lightweight, flexible fabrics with integrated electromagnetic and thermal protection.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111859"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145760746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-dose gamma irradiation effects on HDPE/SiO2 nanocomposite films: Structure, crystallinity, defects, radiation endurance, dispersion, and interfacial behavior","authors":"A.A. Nabiyev ,&nbsp;O.I. Ivankov ,&nbsp;A.K. Azhibekov ,&nbsp;A.H.A. Elmekawy ,&nbsp;E. Popov ,&nbsp;S.F. Samadov ,&nbsp;N.V.M. Trung ,&nbsp;A.K. Mutali ,&nbsp;A.A. Sidorin ,&nbsp;O.S. Orlov ,&nbsp;A.I. Kuklin","doi":"10.1016/j.polymdegradstab.2025.111851","DOIUrl":"10.1016/j.polymdegradstab.2025.111851","url":null,"abstract":"<div><div>This paper presents the findings of a study on the effects of gamma radiation on the structural and thermal characteristics of high-density polyethylene nanocomposite films. These thin films consist of a combination of high-density polyethylene (HDPE) and nano-SiO₂ particles prepared by hydrostatic thermal pressing a mixture of HDPE powder and nano-SiO₂ in various volume concentrations (ω = 1 %, 5 %, 10 %, and 20 %). Radiation-induced defects and microstructural changes in HDPE nanocomposite films containing embedded nano-SiO₂ particles were investigated under high-dose gamma irradiation (100–500 kGy). DBAS analysis revealed that SiO₂ nanoparticles effectively suppress radiation-induced defect formation and positronium formation across most doses through void-filling and interfacial positron trapping mechanisms. Defect evolution showed a transition from chain scission-dominated behavior (increasing defects up to 300 kGy) to crosslinking dominance at 500 kGy, with SiO₂ significantly mitigating both processes. However, at the critical dose of 300 kGy, where crystallinity (66.2 %) and structural reorganization peak, anomalous defect behavior was observed for 1 % and 20 % SiO₂ loadings, attributed to insufficient structural constraint and interfacial stress concentration, respectively. Electron momentum distribution (EMD) analysis confirmed carbonyl group (C = O) formation during oxidative degradation. Optimal radiation resistance was achieved with 5–10 vol% SiO₂ at doses up to 300 kGy, consistent with SAXS and WAXS findings.</div><div>These results provide fundamental insights into radiation resistance mechanisms and support the design of HDPE/SiO₂ nanocomposites for use in high-dose radiation environments.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111851"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hygrothermal behavior of jute/PLA composites: assessment of hygroscopic internal stress and its impact on service life","authors":"Ning Jiang ,&nbsp;Guangxin Li ,&nbsp;Yihua Xu ,&nbsp;Yaomin Li ,&nbsp;Chaozhong Chen","doi":"10.1016/j.polymdegradstab.2025.111868","DOIUrl":"10.1016/j.polymdegradstab.2025.111868","url":null,"abstract":"<div><div>This study investigated the internal damage induced by transient hygroscopic stress in jute/PLA composites under hygrothermal conditions, and a mechanical prediction model was established based on the damage area. A finite element (FE) model, which incorporates the true microstructure of the short fiber reinforced composites, was established using X-ray computed tomography (XCT) and three-dimensional (3D) reconstruction techniques to accurately simulate water absorption and hygroscopic stress evolution behavior. The results of FE analysis of water absorption show good agreement with experimental measurements, indicating that the 3D model is crucial for accurately simulating the water diffusion process within the specimens. In the analysis, the locations of damage area were identified, and their content was quantified. The hygroscopic stress is the main cause of damage initiation in jute/PLA composites, leading to high variations in their mechanical properties and reducing long-term sustainability. Ultimately, by combining the time-temperature superposition (TTS) principle with a residual strength model for internal damage, a mechanical prediction model for plant fiber composites was established based on the damage area, providing accurate predictions of the composites’ mechanical properties. This approach offers an innovative methodology for evaluating the mechanical properties of such composites.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111868"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of long-term electro-thermal-mechanical stresses on insulation degradation of biaxially oriented polypropylene films for dry direct-current capacitors application","authors":"Jiale Song ,&nbsp;Xiangrong Chen ,&nbsp;Zhuohan Li ,&nbsp;Xiaohe Chen ,&nbsp;Ashish Paramane","doi":"10.1016/j.polymdegradstab.2025.111875","DOIUrl":"10.1016/j.polymdegradstab.2025.111875","url":null,"abstract":"<div><div>As a key insulating medium in dry direct-current (DC) capacitors, biaxially oriented polypropylene (BOPP) film undergoes performance degradation under the long-term electro-thermal-mechanical multi-physics field, leading to failure of capacitor. To investigate the degradation mechanism of BOPP film’s insulation properties under long-term multi-physics field stress, a multi-stress aging platform and thermal pulse method (TPM) space charge testing platform were developed indigenously. The physicochemical properties, electrical properties, and space charge characteristics of 5.8 μm thick BOPP films were examined after aging at 150 kV/mm, 80 °C, and 10 N for 0 h, 168 h, 360 h, and 720 h. The results indicate that under prolonged multi-stress aging conditions, polypropylene molecular chains undergo scission, generating low molecular weight products. The size of surface defects, surface roughness, degree of crystallinity, and lamellar thickness gradually increased. The breakdown strength and inception voltage of internal discharge in the film decreased, whereas the discharge repetition rate increased. Successive injection of both positive and negative charges was observed within the films during the aging. The findings demonstrate that the breakdown performance is closely related to changes in charge injection and the internal structure of polypropylene. Increased space charge injection at the nanoscale leads to greater defect sizes and trap densities at the microscale, resulting in electric field distortion that frequently triggers the partial discharges and reduces breakdown strength at the macroscale.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111875"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High performance intrinsically flame-retardant bio-benzoxazine resin derived from 2,5-furandimethylene amine and sesamol: Synthesis and investigations of structure-property relationship","authors":"Weichen Sheng ,&nbsp;Min Zhong ,&nbsp;Yi Liu ,&nbsp;Junhong Zhang ,&nbsp;Tiancheng Zhao ,&nbsp;Fuping Xie ,&nbsp;Kan Zhang","doi":"10.1016/j.polymdegradstab.2025.111912","DOIUrl":"10.1016/j.polymdegradstab.2025.111912","url":null,"abstract":"<div><div>Conventional benzoxazines are largely limited by the dependence on non-renewable resources, insufficient thermal stability, and poor flame retardance properties. This study presents two high-performance monofuran-diamine-type difunctional bio-benzoxazine monomers (MDOPH-fda and DMOPH-fda), whiche were synthesized by reacting 2,5-bis(aminomethyl)furan and paraformaldehyde with either sesamol or 3,4-dimethoxyphenol. The benzoxazine structure was validated using FT-IR, ¹H NMR, ¹³C NMR, HMQC NMR, and HR-MS. The polymerization behavior of the monomers was monitored by DSC and in situ FT-IR. The results demonstrated that the polymerization temperatures of the two benzoxazine monomers were close. The thermal stability and thermomechanical properties of polymers derived from the two benzoxazines were evaluated by TGA and DMA). Due to the monofuran-diamine linking structure that leads to the formation of two oxazine rings, both poly(MDOPH-fda) and poly(DMOPH-fda) exhibit good thermal stability. Their respective Td₁₀ values are 374.8 °C and 330.4 °C, and their char yields at 800 °C are 63.5% and 52.8%, respectively. Due to the benzodioxole structure, poly(MDOPH-fda) exhibit superior thermal stability. Regarding thermomechanical properties, the storage modulus of poly(MDOPH-fda) is 3364.8 MPa, while that of poly(DMOPH-fda) is 3856.1 MPa. Their glass transition temperatures (Tg) are 260 °C and 272 °C, respectively. While these values are close, both are higher than those of commercial benzoxazine resins. Experiments using a Microscale Combustion Calorimeter (MCC) and a vertical combustion test (UL-94) confirmed that the sesamol-based benzoxazine resin, poly(MDOPH-fda), exhibits excellent flame retardance. Its heat release capacity (HRC) is 38.7 J·g^-1·K^-1, and its total heat release (THR) is as low as 0.7 kJ·g^-1, reaching the UL-94 V0 level in the vertical combustion test. Analyses of the surface morphology and chemical composition of the residues after combustion using Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy (LRS) show that poly(MDOPH-fda) is conducive to the formation of a dense graphitized carbon layer at high temperatures. This makies it a strong competitor in the field of high-performance flame-retardant resins.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111912"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative flame resistant composite non-woven fabric from recycled ceramic and polyethylene terephthalate waste fibers","authors":"Lin Weng ,&nbsp;Xiaolin Zhang ,&nbsp;Danting Hui ,&nbsp;Yun Li","doi":"10.1016/j.polymdegradstab.2025.111869","DOIUrl":"10.1016/j.polymdegradstab.2025.111869","url":null,"abstract":"<div><div>Rapid economic growth has led to a surge in global textile consumption, overwhelming waste management infrastructure. Most non-degradable textiles are currently disposed of by landfilling or incineration, contributing to environmental pollution. To address this problem, we efficiently recycled waste into a fireproof composite, featuring a ceramic fiber middle layer and polyethylene terephthalate (PET) fiber outer layers, using sustainable opening, carding, needle punching and hot-pressing techniques. This composite has been certified with a V-0 rating in the UL-94 flammability test, confirming its exceptional flame resistance. Infrared thermal imaging analysis further confirms its excellent thermal insulation and ablative resistance capabilities. Furthermore, an in-depth study on the composition of combustion residue char and gaseous volatiles demonstrated no significant flame hazards and revealed that gas-phase dilution combined with ceramic fiber residue char, disrupted the flame-fuel interaction to inhibit combustion. This research provides a facile and eco-friendly strategy for cost-efficient recovery of waste textiles, not only minimizing resource wastage but also producing a high-value product, thus significantly reducing environmental pollution.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111869"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-step synthesis of intrinsically flame-retardant polyamide 6 elastomers with excellent thermal stability and spinnability","authors":"Yuming Cui ,&nbsp;Qinglan Xue ,&nbsp;Haoyi Hu ,&nbsp;Kai Wang ,&nbsp;Yuhao Liu ,&nbsp;Jiaojiao Shang ,&nbsp;Jianwu Lan ,&nbsp;Shaojian Lin","doi":"10.1016/j.polymdegradstab.2025.111887","DOIUrl":"10.1016/j.polymdegradstab.2025.111887","url":null,"abstract":"<div><div>Thermoplastic polyamide elastomers (TPAEs) are an important class of thermoplastic elastomers (TPEs). However, improving their flame retardancy remains challenging, because such enhancement often leads to adverse effects on the intrinsic thermal stability and mechanical performance of the materials. In this study, a series of intrinsically flame-retardant TPAEs (PAE6-xDPPSA) were synthesized via a one-step melt polycondensation route by incorporating 2- (diphenylphosphinyl methyl) succinic acid (DPPSA) into a TPAE composed of polyamide 6 (PA6) as the hard segment and poly (tetramethylene glycol) (PTMG) as the soft segment. Importantly, the incorporation of DPPSA did not compromise the thermal stability of PA6 elastomers, all PAE6-xDPPSA samples exhibited 5 % weight-loss temperatures above 360 °C, indicating excellent thermal stability. As expected, the flame retardancy of PAE6-xDPPSA was enhanced with increasing DPPSA content, achieving a V-0 rating in UL-94 test and a limiting oxygen index (LOI) above 28 % at 8 wt% of DPPSA. This improvement in flame retardancy resulting from the existence of DPPSA promoted dual-action flame-retardant effects in both the gas phase and the condensed phase. Moreover, PAE6-xDPPSA displayed excellent spinnability and mechanical performance within an appropriate DPPSA content range. In particular, the elastic fibers derived from PAE6–8DPPSA exhibited a tensile strength of 1.82 cN/dtex and an elongation at break of 208.5 %, together with superior flame retardancy. Overall, this study presents an effective strategy for designing intrinsically flame-retardant TPAEs with balanced thermal stability, mechanical properties, and spinnability, paving the way for their potential applications in advanced flame-retardant elastic fibers and engineering materials.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"245 ","pages":"Article 111887"},"PeriodicalIF":7.4,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}