Polymer Degradation and Stability最新文献_第2页

Study on the structure–property relationship of starch/PLA composite films modified by the synergistic effect of aromatic rings and aliphatic chains 芳香环和脂肪链协同改性淀粉/聚乳酸复合膜的结构-性能关系研究

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-21 DOI: 10.1016/j.polymdegradstab.2025.111567

Jun Li , Zhicong Li , Yuan Yan , Danrong Shao , Yao Guo , Rihui Lin

{"title":"Study on the structure–property relationship of starch/PLA composite films modified by the synergistic effect of aromatic rings and aliphatic chains","authors":"Jun Li , Zhicong Li , Yuan Yan , Danrong Shao , Yao Guo , Rihui Lin","doi":"10.1016/j.polymdegradstab.2025.111567","DOIUrl":"10.1016/j.polymdegradstab.2025.111567","url":null,"abstract":"<div><div>To investigate the synergistic effects of flexible aliphatic chains and rigid aromatic rings on the properties of polylactic acid (PLA)-based composites, a series of mono-esterified octanoyl starches (OC) and dual-esterified octanoyl–benzoyl starches (OC-BA) with comparable degrees of substitution (DS) were synthesized. The modified starches were blended with PLA at a 1:1 mass ratio, and composite films were prepared via solution casting. The results indicated that OC with a moderate DS (DS = 1.2) significantly improved the ductility of the films due to the introduction of flexible aliphatic chains. At a similar DS, the benzene rings in the PLA/OC-BA2 structure, in synergy with the fatty acid chains, enabled the composite film to reach a maximum elongation at break of 250.78%. Moreover, OC-BA2 promoted strong interfacial interactions with the PLA matrix through hydrogen bonding and π–π stacking, thereby enhancing both strength and toughness. Molecular docking simulations further elucidated the interfacial configurations and non-covalent interactions under different substitution patterns. In terms of biodegradability, the mono-esterified OC-based composites significantly accelerated the degradation rate of the films, whereas the dual-esterified OC-BA structure further improved the films’ aging resistance, hydrophobicity, and barrier properties. However, its biodegradability was markedly reduced, with the degradation rate of PLA/OC-BA2 being approximately 11.01%. Therefore, incorporating differently modified starches enables targeted regulation of the performance of PLA composite films to meet specific application requirements.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111567"},"PeriodicalIF":6.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713996","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}

引用次数: 0

Denitrification performance and microbial community using polyhydroxyalkanoate as carbon source and biofilm carriers in fluidized bed bioreactor 以聚羟基烷酸酯为碳源和生物膜载体的流化床生物反应器反硝化性能及微生物群落

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-21 DOI: 10.1016/j.polymdegradstab.2025.111566

Zhuang Wang , Wenjie Lai , Yuanyuan Shao , Jesse Zhu

{"title":"Denitrification performance and microbial community using polyhydroxyalkanoate as carbon source and biofilm carriers in fluidized bed bioreactor","authors":"Zhuang Wang , Wenjie Lai , Yuanyuan Shao , Jesse Zhu","doi":"10.1016/j.polymdegradstab.2025.111566","DOIUrl":"10.1016/j.polymdegradstab.2025.111566","url":null,"abstract":"<div><div>This project investigated the denitrification performance and microbial community dynamics in a fluidized bed bioreactor (FBBR) using [Poly (3-hydroxybutyrate)] (PHB) as both solid-phase carbon source (SCS) and biofilm carrier. The reactor achieved a removal of nitrogen loading rate (NLR<em><sub>rem</sub></em>) of 1.02 kg N/(m<sup>3</sup>·d) when hydraulic retention time (HRT) was 0.88 h, with nitrate (NO<sub>3</sub><sup>−</sup>-N) removal exceeding 99.5 % and minimal nitrite (NO<sub>2</sub><sup>−</sup>-N) accumulation. <em>Pseudomonadota</em> (68.3∼88.7 %) and <em>Bacteroidota</em> (2.3∼13.5 %) were observed the dominant phylum via high-throughput sequencing analysis. Meanwhile, <em>Dechloromonas, Zoogloea</em>, and <em>Thauera</em> were identified as the key denitrifying and degradation genus. Biofilm thickness regulation via hydraulic shear force proved critical for maintaining mass transfer efficiency and preventing performance decline. This project demonstrates PHB’s dual role as a biodegradable SCS and biofilm carrier, offering a sustainable strategy for wastewater treatment and biodegradable plastic waste valorization.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111566"},"PeriodicalIF":6.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704606","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}

引用次数: 0

Bio-based Ti3C2Tx/NiCo layered double hydroxides/sodium lignosulfonate system for multifunctional EVA composites: ultra-efficient fire safety and solar-to-thermal conversion 用于多功能EVA复合材料的生物基Ti3C2Tx/NiCo层状双氢氧化物/木质素磺酸钠体系：超高效消防安全和光热转换

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-20 DOI: 10.1016/j.polymdegradstab.2025.111565

Wei-Dou Li , Zi-Han Zeng , Yi-Le Ding , Xin-Yang Wu , Yu-Wei Zhou , Lei Wang , Wu-Fei Tang , Ye-Tang Pan , Sheng Xu

{"title":"Bio-based Ti3C2Tx/NiCo layered double hydroxides/sodium lignosulfonate system for multifunctional EVA composites: ultra-efficient fire safety and solar-to-thermal conversion","authors":"Wei-Dou Li , Zi-Han Zeng , Yi-Le Ding , Xin-Yang Wu , Yu-Wei Zhou , Lei Wang , Wu-Fei Tang , Ye-Tang Pan , Sheng Xu","doi":"10.1016/j.polymdegradstab.2025.111565","DOIUrl":"10.1016/j.polymdegradstab.2025.111565","url":null,"abstract":"<div><div>To overcome the inherent flammability and excessive smoke emission of ethylene vinyl acetate (EVA), this study innovatively designed a heterogeneous flame retardant system based on Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, nickel-cobalt layered double hydroxides (NiCo LDHs), and sodium lignosulfonate (LS). This system achieves high-efficiency flame retardancy in EVA through multicomponent synergistic effects. By leveraging the anti-agglomeration properties of metal-organic frameworks (MOFs), NiCo LDHs nanosheets were uniformly anchored onto Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> surfaces and interlayers. Simultaneously, LS modification enhanced hydrophobicity (water contact angle increased from 21.7° to 63.4°), effectively resolving interfacial incompatibility issues in the EVA matrix. The renewable LS component not only replaced toxic halogenated additives but also synergized with transition metals to catalyze the formation of a dense, graphitized carbon layer during combustion. This enabled dual-phase flame inhibition via radical quenching and physical barrier effects. At a low loading of 5 wt%, the composite exhibited exceptional fire safety performance: a limiting oxygen index of 28.6 %, UL-94 V-0 rating, and reductions in peak heat release rate (26.9 %), peak smoke production rate (29.3 %), and total smoke production (13.4 %). The char residue increased 4.1-fold compared to Neat EVA. Additionally, the composite demonstrated efficient photothermal conversion capabilities, indicating suitability for applications in intelligent fire protection. This work establishes a sustainable, scalable paradigm for designing high-performance flame-retardant polymers.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111565"},"PeriodicalIF":6.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695077","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}

引用次数: 0

Construction of rare earth-based multi-dimensional architectures for high-performance flame-retardant epoxy composites 高性能阻燃环氧复合材料稀土基多维结构的构建

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-18 DOI: 10.1016/j.polymdegradstab.2025.111564

Yuanyuan Zhang , Keqing Zhou , Changhao Wang , Yulun Zhang , Bin Yu , Sheng Zhang

{"title":"Construction of rare earth-based multi-dimensional architectures for high-performance flame-retardant epoxy composites","authors":"Yuanyuan Zhang , Keqing Zhou , Changhao Wang , Yulun Zhang , Bin Yu , Sheng Zhang","doi":"10.1016/j.polymdegradstab.2025.111564","DOIUrl":"10.1016/j.polymdegradstab.2025.111564","url":null,"abstract":"<div><div>Flame retardant modification of Epoxy resin remains a thorny challenge that needs further research. Hence, considering the chemical and physical properties between nanomaterials and rare earth elements, this study integrated CeO<sub>2</sub>-doped La(OH)<sub>3</sub> nanorods (CL) and MoS<sub>2</sub> nanosheets via electrostatic interaction forces, and then a novel rare earth based hybrid with multi-dimensional architectures, CLMP (CeO<sub>2</sub>@La(OH)<sub>3</sub>@MoS<sub>2</sub>@PPy), was obtained by wrapping PPy on the surface of CLM using interfacial engineering strategy. The CLMP not only exhibited well dispersion and interfacial compatibility within the epoxy resin (EP) matrix, but also enhanced the thermal stability, flame retardancy and mechanical properties. With the addition of 2 wt % CLMP hybrids, the peak heat release rate (PHRR), total heat release (THR), peak smoke production rate (PSPR), and total smoke production (TSP) of EP composites were decreased by 41.7 %, 34.7 %, 46.2 %, and 38.9 %, respectively. Subsequently, the amount of carbon residue for EP/CLMP 2.0 composites increased to 30.0 % compared with pure EP, demonstrating improved flame resistance. Furthermore, EP/CLMP 2.0 composites exhibited excellent mechanical properties, resulting the increases of 109.8 % and 45.5 % in the tensile and flexural strength. The flame retardant and mechanical reinforcement mechanisms were proposed. In simple terms, the rare earth-based multi-dimensional architectures designed in this work establishes a promising strategy for achieving the balance between the fire resistance and mechanical performance.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111564"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680304","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}

引用次数: 0

Study of nitrogen-doped carbon quantum dots/sodium lignosulfonate synergistic enhancement of flame retardant properties of polyethylene terephthalate (PET) films 氮掺杂碳量子点/木质素磺酸钠协同增强聚对苯二甲酸乙二醇酯（PET）薄膜阻燃性能的研究

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-18 DOI: 10.1016/j.polymdegradstab.2025.111559

Hongwei Ren , Xiaoyun Liu , Qing Li , Xiaoyu Huang , Haixia Wu , Jinfeng Zhang

{"title":"Study of nitrogen-doped carbon quantum dots/sodium lignosulfonate synergistic enhancement of flame retardant properties of polyethylene terephthalate (PET) films","authors":"Hongwei Ren , Xiaoyun Liu , Qing Li , Xiaoyu Huang , Haixia Wu , Jinfeng Zhang","doi":"10.1016/j.polymdegradstab.2025.111559","DOIUrl":"10.1016/j.polymdegradstab.2025.111559","url":null,"abstract":"<div><div>Polyethylene terephthalate (PET) fabrics are widely used in our lives due to their excellent mechanical strength, high elasticity, wrinkle resistance and abrasion resistance, but their flammability creates a risk of fire events, so flame retardant treatments for PET are necessary. Flame retardants with carbon quantum dots and sodium lignosulfonate acting together can well overcome the shortcomings of the current flame retardants with large additions, environmental hazards and poor thermal stability. In this paper, N-doped CQDs/sodium lignosulfonate/PET composite film (N<img>CQDs/Sodi@PET films) was prepared by a one-step hot solvent method using tetrazolium (Tet) and glycerol (Gly) as raw materials and grafted onto the surface of PET films using sodium lignosulfonate as a dispersant. Flame retardancy tests showed that N<img>CQDs/Sodi@PET had a UL-94 rating of V-0 and an LOI value of 30 %, the residual carbon rate was increased from 10.6 % to 18.2 %, the peak heat release rate was reduced from 1 667 kW/m<sup>2</sup> to 373 kW/m<sup>2</sup>, and the fire-growth index (FGI) was reduced by 56 % and the fire performance index (FPI) was improved by 160 %. This work provides a new method for the preparation of flame retardancy PET fabrics with excellent flame retardancy and thermal stability properties, and the experimental results show that the effect of N-doped carbon quantum dots on the gas phase of polymer combustion is effective.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111559"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686677","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}

引用次数: 0

Fabrication of thin-walled flame-retardant recycled polyethylene composites: synergistic flame retardancy of muscovite in APP/MCA systems 薄壁阻燃再生聚乙烯复合材料的制备：白云母在APP/MCA体系中的协同阻燃性

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-18 DOI: 10.1016/j.polymdegradstab.2025.111561

Xiang Li, Guirong Xie, Zelong Wang

{"title":"Fabrication of thin-walled flame-retardant recycled polyethylene composites: synergistic flame retardancy of muscovite in APP/MCA systems","authors":"Xiang Li, Guirong Xie, Zelong Wang","doi":"10.1016/j.polymdegradstab.2025.111561","DOIUrl":"10.1016/j.polymdegradstab.2025.111561","url":null,"abstract":"<div><div>Thin-walled flame-retardant recycled polyethylene (rPE) materials can be applied in packaging liners for precision instruments and medical equipment. To prepare thin-walled flame-retardant rPE, a series of rPE composites were fabricated through melt extrusion using rPE as the matrix, ammonium polyphosphate (APP) and melamine cyanurate (MCA) as flame retardants, and muscovite (Mus) as a flame-retardant synergist. The flame retardancy, thermal performance, and mechanical properties of the composites were analyzed using a vertical burning tester, oxygen index analyzer, cone calorimeter, thermogravimetric analyzer, and universal testing machine. The results revealed that when the mass ratio of APP to MCA was 3:1, it exhibited the optimal flame retardant effect in rPE. The rPE/33(3#APP/MCA) composite demonstrated an LOI of 31.2 % and achieved a UL94 2.5 mm V-0 flame rating. Compared with pure rPE, its tensile strength and notched impact strength decreased by 38.9 % and 77.9 %, respectively. The flame retardancy and strength of the rPE/(3#APP/MCA)/Mus composites initially increased and then decreased with increasing Mus addition level, while the thermal stability and toughness gradually increased. The rPE/29(3#APP/MCA)/4Mus composite exhibited an LOI of 33.7 % and achieved a UL 94 2.0 mm V-0 flame rating. Compared with rPE/33(3#APP/MCA), the TTI, FPI, T<sub>5 %</sub>, T<sub>max</sub>, tensile strength, flexural strength, and notched impact strength increased by 6.0 %, 54.2 %, 19.3 °C, 21.7 °C, 46.6 %, 27.8 %, and 61.4 %, respectively, the PHRR, AHRR, and THR decreased by 29.9 %, 16.7 %, and 21.4 %, respectively. An appropriate amount of Mus synergized with 3#APP/MCA for flame retardancy in rPE. When 37 % of the compound flame retardant Mus/APP/MCA (Mus:3#APP/MCA=4:29) was incorporated into rPE, the rPE/37(APP/MCA/Mus) composite achieved an LOI of 38.2 % and a UL94 1.0 mm V-0 flame rating.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111561"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686675","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}

引用次数: 0

Process study for high-purity BHET (bis(2-hydroxyethyl) terephthalate) production via microwave-assisted PET depolymerization 微波辅助PET解聚制备高纯度对苯二甲酸双（2-羟乙基）对苯二甲酸乙酯的工艺研究

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-18 DOI: 10.1016/j.polymdegradstab.2025.111557

Yang Yu , Guoliang Shen , Haomeng Ma , Jing Wang , Liuchun Zheng

{"title":"Process study for high-purity BHET (bis(2-hydroxyethyl) terephthalate) production via microwave-assisted PET depolymerization","authors":"Yang Yu , Guoliang Shen , Haomeng Ma , Jing Wang , Liuchun Zheng","doi":"10.1016/j.polymdegradstab.2025.111557","DOIUrl":"10.1016/j.polymdegradstab.2025.111557","url":null,"abstract":"<div><div>This study investigated the microwave-assisted glycolysis of polyethylene terephthalate (PET) using ethylene glycol (EG) to produce colorless bis(2-hydroxyethyl) terephthalate (BHET). Based on the Box-Behnken design combined with response surface methodology, the optimal reaction conditions were determined as follows: mass ratio of EG to PET (w(EG): w(PET)) of 4:1, catalyst dosage of 0.52 wt% relative to PET mass, microwave power of 720 W, and depolymerization duration of 42 min. Through morphological characterization of depolymerized products under microscopic observation, the purification process of BHET was optimized to prevent structural defects during crystallization. Under these optimized conditions, a BHET yield of 91.98 % was achieved. Compared with conventional heating methods, microwave irradiation significantly reduces the high-temperature residence time of the reaction, thereby effectively suppressing side reactions. This improvement results in marked enhancement of BHET chroma and enables its potential to produce PET.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111557"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702525","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}

引用次数: 0

Phosphorus- and metal-free flame-retardant strategy based on π-π stacking enables flexible polyurethane sponge with high compression resistance and oil-water separation properties 基于π-π堆积的无磷无金属阻燃策略使柔性聚氨酯海绵具有高抗压性和油水分离性能

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-18 DOI: 10.1016/j.polymdegradstab.2025.111563

Gaoyuan Li, Hongbo Zhao, Yuling Wang, Qingrui Liu, Wenbo Sun, Biyu Huang, Haopeng Zhang, Jirui Qu, Weijian Liu, Xilei Chen, Chuanmei Jiao

{"title":"Phosphorus- and metal-free flame-retardant strategy based on π-π stacking enables flexible polyurethane sponge with high compression resistance and oil-water separation properties","authors":"Gaoyuan Li, Hongbo Zhao, Yuling Wang, Qingrui Liu, Wenbo Sun, Biyu Huang, Haopeng Zhang, Jirui Qu, Weijian Liu, Xilei Chen, Chuanmei Jiao","doi":"10.1016/j.polymdegradstab.2025.111563","DOIUrl":"10.1016/j.polymdegradstab.2025.111563","url":null,"abstract":"<div><div>The development of adsorbent materials capable of withstanding harsh environmental conditions remains a significant challenge. In this study, a novel flexible polyurethane (FPU) sponge composite (PU@BTC-Abz@Si) was successfully fabricated with outstanding flame retardancy, mechanical robustness, and oil-water separation performance. This was achieved by constructing micro-nano structures on the surface of FPU sponge by in situ self-assembly of dendrimers with π-π stacking interactions, and subsequent grafting with polydimethylsiloxane (PDMS). Notably, the synthesis was accomplished without the incorporation of phosphorus or metal-based flame retardants. Instead, PU@BTC-Abz@Si utilizes a flame-retardant strategy based on π-π stacking, imparting fire safety while minimizing secondary environmental pollution. Compared with pristine FPU sponge, PU@BTC-Abz@Si demonstrated significant reductions in total heat release (THR), total smoke production (TSP), and total carbon monoxide production (TCOP) by 55.4%, 51.9%, and 64.9%, respectively. Furthermore, PU@BTC-Abz@Si exhibited enhanced mechanical stability and high oil-water selectivity. This work offers a sustainable and efficient approach to enhance the functional performance of FPU sponge, with promising implications for environmental protection and fire-safe engineering applications.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111563"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704161","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}

引用次数: 0

Polyphosphazene based core-shell structure using MXene as a hard template: Improving the toughness and fire safety performance of UPR composites 以MXene为硬模板的聚磷腈基核壳结构：提高UPR复合材料的韧性和防火安全性能

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-18 DOI: 10.1016/j.polymdegradstab.2025.111560

Yifan Zhou , Ke Ma , Laibin Zhang

{"title":"Polyphosphazene based core-shell structure using MXene as a hard template: Improving the toughness and fire safety performance of UPR composites","authors":"Yifan Zhou , Ke Ma , Laibin Zhang","doi":"10.1016/j.polymdegradstab.2025.111560","DOIUrl":"10.1016/j.polymdegradstab.2025.111560","url":null,"abstract":"<div><div>Unsaturated polyester resin (UPR) offers distinct advantages in processability and versatility. However, its practical implementation in demanding scenarios is frequently hampered by high flammability and inherent brittleness. Developing efficient multifunctional flame retardants that simultaneously enhance fire resistance and toughness remains a critical need in material science. Addressing this challenge, this study employs the design concepts of “synergistic flame retardancy enhancement” and “nanotechnology toughening” to ingeniously construct a novel multifunctional core-shell flame retardant, Ti<sub>3</sub>C<sub>2</sub>Tx@PPZ. The core consists of carbonized titanium nanosheets (Ti<sub>3</sub>C<sub>2</sub>Tx), meticulously encapsulated within a shell of polyphosphazene-based covalent organic frameworks (PPZ-COFs), achieving synergistic performance optimization and complementarity. Upon integrating Ti<sub>3</sub>C<sub>2</sub>Tx@PPZ into UPR, the resulting composites exhibit remarkable concurrent improvements in both fire resistance and mechanical toughness. This enhancement is primarily attributed to the synergistic interaction between Ti<sub>3</sub>C<sub>2</sub>Tx and PPZ. At a loading of 2 wt% Ti<sub>3</sub>C<sub>2</sub>Tx@PPZ, the composite achieved a significant 54.2% reduction in peak heat release rate (PHRR), with total CO production (COP) showing a similar downward trend. Furthermore, a minimal loading of 0.5 wt% yielded the highest impact strength (10.9 MPa), representing a 179% increase compared to pure UPR. Crucially, this work pioneers the integration of COFs design principles into flame retardant architecture. Detailed analysis reveals the underlying flame-retardant and toughening mechanisms driven by multiple synergistic effects, providing valuable insights for the development of next-generation high-efficiency multifunctional flame retardants.</div></div>","PeriodicalId":406,"journal":{"name":"Polymer Degradation and Stability","volume":"241 ","pages":"Article 111560"},"PeriodicalIF":6.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686678","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}

引用次数: 0

Bioinspired tannic acid-based adhesive with hyperbranched polymer and nano-Mg(OH)2 hybrids for high-performance, flame-retardant, and sustainable plywood 生物启发单宁酸为基础的粘合剂，具有超支化聚合物和纳米mg (OH)2混合物，用于高性能，阻燃和可持续胶合板

IF 6.3 2区化学

Polymer Degradation and Stability Pub Date : 2025-07-17 DOI: 10.1016/j.polymdegradstab.2025.111562

Yannan Bai , Tianyu Zhang , Junhu Wu , Tongda Liu , Tenghua Huang , Lin Liu , Byung‑Dae Park , Jun Li , Guanben Du , Long Yang , Xin Ran

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