Polymer最新文献 - Book学术

Measuring the equilibrium melting enthalpy (ΔH0) and the equilibrium melting temperature (Tm0) of high molecular weight Poly(3-hexylthiophene) 测定高分子量聚（3-己基噻吩）的平衡熔化焓（ΔH0）和平衡熔化温度（Tm0）

IF 4.6 2区化学

Polymer Pub Date : 2025-10-08 DOI: 10.1016/j.polymer.2025.129199

Jorge L. Olmedo-Martínez, Marián Prada-Cortés, Alberto Peinador Veiga, Matteo Sanviti, Jaime Martín

{"title":"Measuring the equilibrium melting enthalpy (ΔH0) and the equilibrium melting temperature (Tm0) of high molecular weight Poly(3-hexylthiophene)","authors":"Jorge L. Olmedo-Martínez, Marián Prada-Cortés, Alberto Peinador Veiga, Matteo Sanviti, Jaime Martín","doi":"10.1016/j.polymer.2025.129199","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129199","url":null,"abstract":"The close correlation between device operation and the degree of crystallinity in semicrystalline semiconducting polymers, e.g. poly(3-hexylthiophene) (P3HT), highlights the need for correct values of the crystal-related thermodynamic parameters from which reliable values of the degree of crystallinity can be calculated. The objective of this work is to provide an overview of the methods used and the equilibrium melting temperature (Tm0) and equilibrium melting enthalpy (ΔH0) values obtained to date, as well as to attempt to reach an agreement on these values. To this end, we investigate the thermodynamic parameters needed to calculate the degree of crystallinity of P3HT by calorimetry. For that, the crystallization behavior and thermodynamics of blends of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), a prototypical electron acceptor molecule, are investigated. The miscibility of the two components in the liquid state was confirmed by the depression of the P3HT melting temperature and the composition-dependent single glass transition temperature (Tg), which follows the Fox equation. Tm0 were determined for neat P3HT and its blends via Hoffman–Weeks extrapolation. These values enabled the application of the Flory–Huggins model, resulting in an ΔH0 of 68 J g-1 for P3HT. This thermodynamic parameter was subsequently used to quantify the degree of crystallinity of P3HT blends. Our approach provides a robust and internally consistent framework for determining the degree of crystallinity in semicrystalline semiconducting polymer systems.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"83 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241396","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

Development of polar phases in poly(vinylidene fluoride-co-hexafluoropropylene)/Expanded Graphite composites during 3-D printing as revealed by “operando” small and wide angle X-ray scattering “operando”小广角x射线散射揭示了聚偏氟乙烯-共六氟丙烯/膨胀石墨复合材料在3d打印过程中极性相的发展

IF 4.6 2区化学

Polymer Pub Date : 2025-10-08 DOI: 10.1016/j.polymer.2025.129198

Tiberio A. Ezquerra, Oscar Gálvez, Mari Cruz García-Gutiérrez, Marc Malfois, Aurora Nogales, Esther Rebollar, Igors Šics

{"title":"Development of polar phases in poly(vinylidene fluoride-co-hexafluoropropylene)/Expanded Graphite composites during 3-D printing as revealed by “operando” small and wide angle X-ray scattering","authors":"Tiberio A. Ezquerra, Oscar Gálvez, Mari Cruz García-Gutiérrez, Marc Malfois, Aurora Nogales, Esther Rebollar, Igors Šics","doi":"10.1016/j.polymer.2025.129198","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129198","url":null,"abstract":"Here we present a research work about the crystallization of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and of one PVDF-HFP composite with expanded graphite (EG) as nanoadditive during 3D printing Fused Filament Fabrication (FFF). Simultaneous Small and Wide Angle X-ray Scattering experiments (SAXS and WAXS) were performed “in situ” under “operando” conditions. The X-ray experiments clearly reveal the presence of a polar phase in the PVDF-HFP/EG while for PVDF-HFP its presence is not obvious. Complementary Fourier Transform Infrared Spectroscopy experiments corroborate the presence of the polar phase for both materials. For PVDF-HFP crystallization is faster at the interfaces (polymer-air and polymer-polymer) than in other points within a printed line, being the crystallinity lower at the interfaces. However, for the PVDF-HF composite, neither crystallization rate nor crystallinity is dependent on position. The effect of EG, acting as nucleating agent, has been discussed as being the reason for this behavior.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"105 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241497","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

Crystallization kinetics of PEEK nanocomposites with hydroxyapatite and zinc oxide: influence of nanoparticle morphology and hybridization 羟基磷灰石/氧化锌PEEK纳米复合材料结晶动力学：纳米颗粒形态和杂化的影响

IF 4.6 2区化学

Polymer Pub Date : 2025-10-08 DOI: 10.1016/j.polymer.2025.129195

Mônica Rufino Senra, Maria de Fátima Vieira Marques

{"title":"Crystallization kinetics of PEEK nanocomposites with hydroxyapatite and zinc oxide: influence of nanoparticle morphology and hybridization","authors":"Mônica Rufino Senra, Maria de Fátima Vieira Marques","doi":"10.1016/j.polymer.2025.129195","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129195","url":null,"abstract":"This study explores the isothermal and non-isothermal crystallization behavior of poly(ether ether ketone) (PEEK) nanocomposites reinforced with hydroxyapatite (HA) and zinc oxide (ZnO), with emphasis on the role of filler morphology and hybridization. Differential scanning calorimetry (DSC) combined with Avrami analysis was employed to investigate crystallization kinetics at multiple temperatures. While conventional nanofillers generally delay crystallization due to hindered chain mobility, the incorporation of 2.5 wt.% flower-like ZnO (fZnO) significantly mitigated this effect, showing crystallization behavior comparable to neat PEEK. In contrast, spherical ZnO (cZnO), HA, and their hybrid systems led to extended crystallization times. Despite variations in crystallization rate, melting temperature (Tm) and equilibrium melting temperature (Tm0) remained nearly unchanged, indicating preserved lamellar thickness. The results highlight that nanoparticle morphology strongly influences nucleation dynamics, and fZnO offers a promising strategy to tailor crystallization without compromising crystalline structure. These findings provide key insights for designing high-performance PEEK-based materials for structural and biomedical applications.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"28 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241392","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

Molecular design of Carborane-containing Polyimide copolymers: enhanced high-temperature resistance and tribological performance 含碳硼烷聚酰亚胺共聚物的分子设计：增强耐高温性能和摩擦学性能

IF 4.6 2区化学

Polymer Pub Date : 2025-10-07 DOI: 10.1016/j.polymer.2025.129185

Chunying Min, Yaxiang Su, Hongyu Liang, Xuezhong Zhang

{"title":"Molecular design of Carborane-containing Polyimide copolymers: enhanced high-temperature resistance and tribological performance","authors":"Chunying Min, Yaxiang Su, Hongyu Liang, Xuezhong Zhang","doi":"10.1016/j.polymer.2025.129185","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129185","url":null,"abstract":"Conventional polyimides (PI) suffer significant mass loss and performance degradation under prolonged high temperature exposure, limiting their utility in extreme thermal environments. This study employs a molecular-level design strategy to synthesize carborane-containing polyimide copolymer (BMCB/PI) via copolymerization of 1,7-bis(aminophenyl)-meta-carborane (BMCB) with 4,4′-oxydiphthalic anhydride (ODPA) and the flexible diamine 1,4-bis(4-aminophenoxy)benzene (TPE-Q). The 30BMCB/PI film demonstrates remarkable improvements in thermomechanical properties (Td5% = 552.6 °C, Young's modulus = 2.17 GPa) compared to pure PI (494.6 °C, 1.63 GPa). Moreover, its unique high-temperature resistance mechanism enables an ultrahigh char yield (Rw) of 65.9% at 800 °C in air, indicating exceptional thermal stability. Notably, the 30BMCB/PI film also exhibited particularly excellent tribological properties, with a 54% reduction in specific wear rate under dry sliding conditions compared to pure PI. It can maintain excellent tribological properties even in high-temperature (100-400 °C) environments. This study achieves synergistic enhancement of thermal stability, mechanical properties, and tribological performance in polyimide materials through covalent incorporation of carborane structural units into the polyimide backbone, providing novel insights for designing high-performance polymers for high-temperature tribological applications.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"5 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145234960","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

Elevating Polycarbonate Performance: Exploiting In-situ Nanofibrillated and Crosslinked Ethylene Propylene Diene Monomer Networks to Achieve Superior Material Properties 提高聚碳酸酯性能：利用原位纳米纤化和交联乙丙二烯单体网络实现优越的材料性能

IF 4.6 2区化学

Polymer Pub Date : 2025-10-07 DOI: 10.1016/j.polymer.2025.129174

Hamidreza Akrami, Ali Reza Monfared, Mohamad Kheradmandkeysomi, Sasan Rezaei, Iman Soltani, Chul B. Park

{"title":"Elevating Polycarbonate Performance: Exploiting In-situ Nanofibrillated and Crosslinked Ethylene Propylene Diene Monomer Networks to Achieve Superior Material Properties","authors":"Hamidreza Akrami, Ali Reza Monfared, Mohamad Kheradmandkeysomi, Sasan Rezaei, Iman Soltani, Chul B. Park","doi":"10.1016/j.polymer.2025.129174","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129174","url":null,"abstract":"The incorporation of an elastomer into polymer composites is a widely employed method to enhance toughness; however, this often results in the sacrificed crucial matrix properties, such as stiffness and strength. In this study, an efficient composite technology is presented for enhancing the toughness of polycarbonate (PC) with a marginal sacrificing of stiffness and strength. Initially, PC-spherical ethylene propylene diene monomer (EPDM) blends were prepared using a twin-screw extruder (TSE), followed by a hot stretching process in a spunbond system. The produced PC microfibers containing EPDM nanofibrils were exposed to gamma radiation to effectively crosslink EPDM through ethylidene norbornene (ENB) and thereby preserve the nanofibril geometry, while crosslinking the PC phase slightly. Morphological observations of the reheated blends revealed a well-dispersed, crosslinked nanofibrillar EPDM network within the PC matrix, featuring an average diameter of 40-80 nm. Our study investigates the influence of EPDM nanofibril size and content on PC composites. We found that incorporating nanofibril EPDM significantly improves toughness compared to spherical EPDM phases, with over 300% increase in elongation at break and over 200% increase in Izod impact strength. These findings highlight the efficacy of nanofibril EPDM in advancing PC's mechanical properties, offering promising prospects for polymer engineering. The transparency of PC was maintained with the presence of nanofibril EPDM, making it suitable for various transparent applications.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"8 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145234961","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

Underwater self-healing of microphase-separated PLLA–b–PTMC biocompatible elastomers 微相分离pla - b - ptmc生物相容性弹性体的水下自修复

IF 4.6 2区化学

Polymer Pub Date : 2025-10-06 DOI: 10.1016/j.polymer.2025.129180

Xin Hu, Shibo Luo, Zhen Zhang, Peijie Hou, Jun Wang, Lifang Zhang

引用次数: 0

Enhanced performance of PVC-based electromagnetic shielding composite films via solvent swelling-induced and microstructure optimization 通过溶剂膨胀诱导和微观结构优化提高pvc基电磁屏蔽复合膜的性能

IF 4.6 2区化学

Polymer Pub Date : 2025-10-06 DOI: 10.1016/j.polymer.2025.129179

Qingqing Qin, Shuhao Qin, Yingmo Hu, Ting Lei, Xiao Wu, Jingkui Yang, Zhenyu Cui, Yuanyuan Yang, Mingze An

{"title":"Enhanced performance of PVC-based electromagnetic shielding composite films via solvent swelling-induced and microstructure optimization","authors":"Qingqing Qin, Shuhao Qin, Yingmo Hu, Ting Lei, Xiao Wu, Jingkui Yang, Zhenyu Cui, Yuanyuan Yang, Mingze An","doi":"10.1016/j.polymer.2025.129179","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129179","url":null,"abstract":"With the growing severity of electromagnetic interference (EMI), developing efficient and more environmentally friendly shielding materials has become crucial. Traditional evaporation-induced phase separation (EIPS) methods suffer from long preparation cycles, significant solvent evaporation posing flash explosion hazards, and issues of filler sedimentation. Although non-solvent-induced phase separation (NIPS) is greener, its electrical conductivity and EMI shielding effectiveness (SE) remains limited. To address these challenges, this study proposes an innovative strategy: first preparing polyvinyl chloride (PVC)/carbon black (CB)/carbon nanotube (CNT) composite films via NIPS, followed by a solvent swelling-thermal drying process to reconstruct the conductive network. The NIPS method rapidly immobilizes fillers to prevent sedimentation, while subsequent immersion in a DMAc/H2O mixed solvent (8:2 mass ratio) induces PVC swelling, promoting filler redistribution and densification. During thermal drying, solvent evaporation induces film shrinkage, further optimizing filler connectivity. Under optimized conditions (60 °C drying temperature, 20 minutes soaking), the film thickness decreases from 0.24 mm to 0.04 mm, while electrical conductivity dramatically increases from 16.5 S/m to 567.6 S/m, and EMI shielding effectiveness (SE) improves from 5.3 dB to 18.1 dB. When the film thickness is increased to 0.2 mm, the EMI SE reaches 32.9 dB, outperforming films prepared by conventional EIPS. This study not only overcomes the electrical conductivity limitations of the NIPS method but also avoids the safety risks of the EIPS method, providing a novel, greener, and safer approach for the fabrication of lightweight, high-performance EMI shielding materials. The proposed strategy shows significant potential for applications in flexible electronics and communication devices.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"74 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145234962","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

Characterization of the Deformation and Fracture of Tough Double-Network Hydrogels 韧性双网状水凝胶的变形与断裂表征

IF 4.6 2区化学

Polymer Pub Date : 2025-10-06 DOI: 10.1016/j.polymer.2025.129190

Sitao Wang, Eric Euchler, Konrad Schneider, Sven Wießner

{"title":"Characterization of the Deformation and Fracture of Tough Double-Network Hydrogels","authors":"Sitao Wang, Eric Euchler, Konrad Schneider, Sven Wießner","doi":"10.1016/j.polymer.2025.129190","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129190","url":null,"abstract":"The remarkable toughness of double-network hydrogels (DNHs) arise from the energy dissipation due to the deformation-induced failure of the stiffer first network, while the softer second network maintains the sample’s overall integrity. In this study, a new approach for strain field analysis suitable for DNHs has been developed by introducing lycopodium spores to create robust speckle patterns on the slippery hydrogel surface. Thus, digital image correlation (DIC) method was feasible for localized strain field analysis during mechanical deformation, i.e. tensile testing, exhibiting inhomogeneous deformation, e.g. during necking. Further, strain field analysis during re-swelling experiments, a straightforward and effective technique to visualize and characterize pre-stretched zones formed during necking in DNHs, has been improved. This DIC-based analysis, performed in a liquid, offers an innovative and complementary approach for internal fracture analysis of DNHs, without requiring complex post-processing, expensive instrumentation or sophisticated chemistry, and provides a deeper understanding of fracture resulting from irreversible damage in DNHs, which is dominated by first-network fracture.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"58 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145234965","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

Temperature and pH responsive raspberry-like hollow nanoparticles prepared by seed photopolymerization under green LED irradiation 绿色LED照射下种子光聚合制备的树莓样中空纳米颗粒对温度和pH响应

IF 4.6 2区化学

Polymer Pub Date : 2025-10-06 DOI: 10.1016/j.polymer.2025.129193

Siyuan Yu, Ying Liu, Zichang Lu, Yuanyuan Gu, Jingbao Wang, Boxuan Peng, Junxia Deng, Baoliang Liu, Jinfeng Xing

引用次数: 0

Facile design of amphiphilic multi-functional copolyprodrug for pH/GSH dual-responsive tumor chemotherapy and self-enhanced ferroptosis 用于pH/GSH双反应肿瘤化疗和自增强铁下垂的两亲性多功能共聚前药的简易设计

IF 4.6 2区化学

Polymer Pub Date : 2025-10-06 DOI: 10.1016/j.polymer.2025.129186

Xiaomei Zhao, Ruonan Zhao, Peng Liu

引用次数: 0