IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-06 DOI: 10.1016/j.polymer.2026.129697

Weizhen Huang , Jieyu Xue , Qiyue Xiao , Ruohan Zhao , Yuanrong Ding , Jianxun Zhang , Zhou Chen , Yong Yang

{"title":"Enhanced noise reduction of melamine foam through surface roughness induced by ZIF67 loading","authors":"Weizhen Huang , Jieyu Xue , Qiyue Xiao , Ruohan Zhao , Yuanrong Ding , Jianxun Zhang , Zhou Chen , Yong Yang","doi":"10.1016/j.polymer.2026.129697","DOIUrl":"10.1016/j.polymer.2026.129697","url":null,"abstract":"<div><div>Noise pollution has long been a critical challenge affecting daily life and industrial activities. Porous materials, such as melamine foam, are widely used for noise reduction due to their excellent sound absorption, low density, and facile processability. However, their sound absorption properties are often limited by the control of thickness or quality in practical applications. This study presents a polydopamine (PDA) mediated surface modification approach, in which zeolitic imidazolate framework 67 (ZIF67) are grew on melamine foam (MF) to enhance its acoustic and mechanical properties. The ZIF67/PDA/MF composite (ZPM) possesses outstanding acoustic performance with a best noise reduction coefficient (NRC) of 0.64, while maintaining sound transmission loss (STL) values exceeding 15 dB above 500 Hz and reaching a maximum of 30.95 dB at 6400 Hz. And it attains a maximum modulus of 35.1 kPa at 60% strain. These improvements stem from the optimized foam skeleton structure, micropores formed via ZIF67 deposition, and increased surface roughness that reinforces the interfacial friction damping effect. This simple yet versatile strategy can be extended to other porous materials, demonstrating significant potential for noise control in industrial, architectural, and transportation applications.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129697"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135337","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

Design and synthesis of a spider silk-inspired bio-based polyamide with exceptional integrated properties 具有优异综合性能的蜘蛛丝启发生物基聚酰胺的设计与合成

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-09 DOI: 10.1016/j.polymer.2026.129724

Xiao-Liang Peng, Cong Deng, Ze-Yong Zhao, Yu-Zhong Wang

{"title":"Design and synthesis of a spider silk-inspired bio-based polyamide with exceptional integrated properties","authors":"Xiao-Liang Peng, Cong Deng, Ze-Yong Zhao, Yu-Zhong Wang","doi":"10.1016/j.polymer.2026.129724","DOIUrl":"10.1016/j.polymer.2026.129724","url":null,"abstract":"<div><div>Given the profound environmental implications of climate change, the plastics industry necessitates transitioning from petroleum-derived resources to sustainable bio-based alternatives, particularly polyamides, due to the substantial carbon footprint associated with conventional production. Achieving this transition requires not only renewable feedstocks and environmentally benign synthesis, but also whether the resulting polyamide demonstrates well-rounded properties to ensure viability as a replacement for existing petroleum-based counterparts. Instead of developing novel bio-based compounds via new reaction pathways for subsequent polymerization, a more efficient strategy involves designing polymers directly from established bio-based feedstocks. In this study, a spider silk–inspired structural motif was incorporated into polyamides, yielding a biomimetic high-performance polyamide derived from established industrial bio-based feedstocks. Additionally, an efficient, catalyst-free melt polycondensation approach was developed, further enhancing the environmental sustainability of the synthesis. The resultant material demonstrates superior overall performance relative to PA12, a petroleum-based polyamide renowned for its balanced properties, positioning this material as a viable bio-based alternative to conventional petroleum-derived polyamides. This study proposes a viable approach for designing and synthesizing environmentally sustainable polyamides directly from commercially available bio-based feedstocks and provides insights for advancing low-carbon development of polyamide materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129724"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146436","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

Renewable coatings from liquefied wood: Linking epoxide structure to material properties and chemical recyclability 液化木材的可再生涂料：将环氧化物结构与材料性能和化学可回收性联系起来

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-01-31 DOI: 10.1016/j.polymer.2026.129680

Qisong Hu , Steven Brockötter , Jean-Paul Lange , M. Pilar Ruiz , Christian Struck , Frederik R. Wurm

{"title":"Renewable coatings from liquefied wood: Linking epoxide structure to material properties and chemical recyclability","authors":"Qisong Hu , Steven Brockötter , Jean-Paul Lange , M. Pilar Ruiz , Christian Struck , Frederik R. Wurm","doi":"10.1016/j.polymer.2026.129680","DOIUrl":"10.1016/j.polymer.2026.129680","url":null,"abstract":"<div><div>The heavy fraction of liquefied wood (LW) serves as a promising renewable precursor for polymeric coatings. Owing to its inherent brittleness and relatively low molecular weight, LW requires crosslinking to form durable films. Previous work demonstrates that LW is curable with bio-based glycerol diglycidyl ether (GDE), yielding wood coatings with favorable properties and recyclability. In this study, we systematically studied two additional, structurally distinct epoxides: bisphenol A diglycidyl ether (BDE), the widely used commercial aromatic standard, and poly(ethylene glycol) diglycidyl ether (PDE), which contains long, flexible aliphatic ethers. These chemical differences enable a rigorous investigation of how epoxide structure influences curing behavior, material properties, and circularity. Fourier-transform infrared spectroscopy and differential scanning calorimetry confirm successful crosslinking. Analysis of gel content, thermal stability, and nanoindentation reveals dramatic structural effects: BDE produces rigid, dense networks, increasing the glass transition temperature (<em>T</em>g) up to 83 °C (vs. LW at ∼31 °C) and maintaining approximately 50% gloss retention after 2.5 months of accelerated weathering. In contrast, PDE leads to soft films exhibiting substantial hydrogel-like swelling, with water uptake reaching 207 wt%. Recycling studies via liquefaction verify that both LW–BDE and LW–GDE coatings are chemically recyclable. The LW–PDE system, due to its low crosslink density (gel content below 12 wt%), remains soluble and is easily recovered in solution form. These results collectively demonstrate that the choice of epoxide allows for tuning the property profile of LW-based renewable coatings while fully preserving their end-of-life circularity.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129680"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146095658","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

Valorization of pine nut shells in polypropylene and low-density polyethylene composites 松子壳在聚丙烯和低密度聚乙烯复合材料中的增值

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-03 DOI: 10.1016/j.polymer.2026.129698

Grazia Totaro, Andrea Corti, Rayan Junges, Raffaele Remorini, Valentina Paganini, Simona Braccini, Antonella Manariti, Dario Puppi

{"title":"Valorization of pine nut shells in polypropylene and low-density polyethylene composites","authors":"Grazia Totaro, Andrea Corti, Rayan Junges, Raffaele Remorini, Valentina Paganini, Simona Braccini, Antonella Manariti, Dario Puppi","doi":"10.1016/j.polymer.2026.129698","DOIUrl":"10.1016/j.polymer.2026.129698","url":null,"abstract":"<div><div>The pine nut industry generates a high amount of residues, currently under-valorized in most cases as energy production through incineration. A more effective end-of-life option involves using pine nut shells in polymeric composites, since they represent a source of valuable compounds, such as polysaccharides, lignin, and polyphenols. In the current study, composites were prepared by melt blending pine nut shells with polypropylene and low-density polyethylene. In particular, the composites were loaded with up to 10% and 30% by weight of pine nut shells with respect to polypropylene and polyethylene, respectively. To improve the compatibilization with the hydrophobic matrices, the natural filler was functionalized with stearic acid and added as a compatibilizer. The filler was characterized in terms of chemical composition, antioxidant capability, thermogravimetric analysis, and infrared spectroscopy. Thermal and mechanical properties of the final materials were evaluated through differential scanning calorimetry and tensile testing. Some composites were subjected to accelerated UV aging to assess the antioxidant effect of the biowaste loaded. This approach has a high potential as to what concerns the reduction of plastics use, limiting the use of fossil-derived polyolefins, improving their durability with natural fillers while maintaining their thermal and mechanical properties, and avoiding waste dumping.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129698"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110995","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

Preparation and performance of bio-based composite film with superhydrophobic surface using a simple enhancement strategy, and their applications 超疏水表面生物基复合膜的制备及其性能研究

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-06 DOI: 10.1016/j.polymer.2026.129718

Xin Zhang , Jiawei Li , Hongyan Wang , Tianzi Meng , Xiaojian Zhou , Liangjun Xiao , Hui Wang

{"title":"Preparation and performance of bio-based composite film with superhydrophobic surface using a simple enhancement strategy, and their applications","authors":"Xin Zhang , Jiawei Li , Hongyan Wang , Tianzi Meng , Xiaojian Zhou , Liangjun Xiao , Hui Wang","doi":"10.1016/j.polymer.2026.129718","DOIUrl":"10.1016/j.polymer.2026.129718","url":null,"abstract":"<div><div>The application of bio-based materials is considered an effective way to address the pollution caused by non-biodegradable petroleum-based products. However, the poor water resistance of bio-based products is still a barrier hindering their application due to the hydrophilicity of biomass raw materials. In this work, a simple enhancement strategy was developed to prepare a bio-based film with excellent hydrophobicity. A grafted copolymerization was achieved under a redox system between using konjac flour (KF) and dialdehyde starch (DAS) as the raw film-forming substances, and silicon dioxide (SiO<sub>2</sub>) was employed as an enhancing component to improve the water resistance of the resulting film. The results indicated that the performance and hydrophobicity of the prepared films were directly related to the amount of DAS and the effect of SiO<sub>2</sub>, the best tensile strength was 42.26 MPa with a water contact angle of 153°. When used as a preservative film for bananas, the weight loss in a 7-day experiment was only 7.18%. Additionally, the biodegradation rate of the film exceeded 80% over a 30-day experimental period.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129718"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135320","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 amphiphobic fabrics with excellent and durable hydrophobicity and oleophobicity via C4 short-fluorinated polymers 利用C4短氟化聚合物制备具有优异和耐用的疏水性和疏油性的双疏织物

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-09 DOI: 10.1016/j.polymer.2026.129725

Yajing Zhu , Anyang Duan , Zhonglin Xiang , Xiaoyan Wang , Yang Jiang , Changhai Xu , Jinmei Du

{"title":"Fabrication of amphiphobic fabrics with excellent and durable hydrophobicity and oleophobicity via C4 short-fluorinated polymers","authors":"Yajing Zhu , Anyang Duan , Zhonglin Xiang , Xiaoyan Wang , Yang Jiang , Changhai Xu , Jinmei Du","doi":"10.1016/j.polymer.2026.129725","DOIUrl":"10.1016/j.polymer.2026.129725","url":null,"abstract":"<div><div>Over the decades, long-chain perfluoroalkyl substances were historically employed to provide textiles with water and oil-repellent properties, but have been globally restricted due to their environmental and biological hazards. While short-chain replacements offer a reduced toxicological profile, they consequently suffer from inferior amphiphobicity. To address this, an amphiphobic polymer of C4-fluorinated acrylate with aromatic structures (NV-PAA) was synthesized via esterification of 1H,1H,2H,2H-perfluorohexan-1-ol with 4-vinylbenzoic acid, followed by emulsion polymerization with acrylate monomers. The resulting NV-PAA was dip-coated onto cotton fabric to fabricate an amphiphobic fabric (NV-PAA@CF). The amphiphobicity of the NV-PAA@CF surpassed that of the non-aromatic modified fabric in terms of water contact angle (WCA), oil contact angle (OCA), water sliding angle (WSA), and oil sliding angle (OSA) (ΔWCA = +5.7° and ΔWSA = -6.9°, ΔOCA = +8.8° and ΔOSA = −18.2°), even without engineered surface roughness. This advancement stems from the incorporation of the benzene ring, which enhances the crystallinity of the fluorinated carbon alkyl side chains. The NV-PAA@CF also resisted various oil droplets and contaminated liquid droplets, demonstrating exceptional self-cleaning and anti-fouling characteristics. Even after physical abrasion, chemical corrosion, and washing, WCA and OCA of the NV-PAA@CF remained above 150° and 140°, respectively, demonstrating its remarkable durability. This work presents a high-performance short-chain fluoropolymer coating design for amphiphobic textiles, aiming to advance sustainable development.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129725"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146435","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

Comparative extraction, characterization, and fabrication of bioactive polysaccharide-based nanofibers from Cordia myxa fruit for potential wound dressing applications 比较提取、表征和制备具有生物活性的多聚糖纳米纤维，用于潜在的伤口敷料应用

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-10 DOI: 10.1016/j.polymer.2026.129722

Alireza Keshvari , Reza Azin , Shahriar Osfouri , Sasan Zaeri

{"title":"Comparative extraction, characterization, and fabrication of bioactive polysaccharide-based nanofibers from Cordia myxa fruit for potential wound dressing applications","authors":"Alireza Keshvari , Reza Azin , Shahriar Osfouri , Sasan Zaeri","doi":"10.1016/j.polymer.2026.129722","DOIUrl":"10.1016/j.polymer.2026.129722","url":null,"abstract":"<div><div>This study investigated the extraction, characterization, and fabrication of nanofibers from polysaccharides derived from <em>Cordia myxa</em> fruit using hot water extraction (HWE) and ultrasound-assisted extraction (USAE). Extraction conditions were optimized using response surface methodology, yielding 8.93% (HWE) and 8.40% (USAE), which confirmed the efficiency and shorter processing time of USAE. Although both methods produced polysaccharides with similar saccharide compositions, the USAE-derived sample showed superior quality-being protein-free (vs. 8.2% protein in HWE), with lower ash content (4.3%) and stronger antioxidant activity. It also exhibited higher apparent viscosity and greater colloidal stability (−71 mV vs. −56 mV), indicating improved purity and functionality. USAE-derived polysaccharide was selected for nanofiber fabrication. Pure polysaccharide was not electrospinnable, but blending with 6% (w/v) polyvinyl alcohol (PVA) enabled the formation of uniform, bead-free fibers at low polysaccharide concentrations (0.25–0.5% (w/v)). The nanofibers exhibited high porosity, enhanced thermal stability, and strong crosslinking after treatment with glutaraldehyde vapor. They also showed excellent water absorption and slow degradation, making them suitable for wound dressing use. Antioxidant and release analyses revealed complete release of the 0.25% formulation within 72 h, while the 0.5% fibers showed a slower, sustained release profile. Cytocompatibility and adhesion assays using L929 fibroblasts confirmed non-cytotoxic behavior and improved cell spreading on polysaccharide-containing mats. Overall, ultrasound-assisted extraction coupled with PVA electrospinning produced antioxidant, biocompatible, and thermally stable nanofibers with strong potential for wound-healing applications.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129722"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146147620","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

Probing the energy dissipation mechanisms of shear thickening gel at molecular level 从分子水平探讨剪切增稠凝胶的能量耗散机制

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-11 DOI: 10.1016/j.polymer.2026.129736

Yuan Yao , Bing Liu , Kang Wang , Yuxin Xia , Huaxia Deng , Xinglong Gong

{"title":"Probing the energy dissipation mechanisms of shear thickening gel at molecular level","authors":"Yuan Yao , Bing Liu , Kang Wang , Yuxin Xia , Huaxia Deng , Xinglong Gong","doi":"10.1016/j.polymer.2026.129736","DOIUrl":"10.1016/j.polymer.2026.129736","url":null,"abstract":"<div><div>Shear thickening gels (STGs) exhibit remarkable impact resistance and energy absorption properties owing to the non-linear and reversible mechanical properties. However, the molecular-level mechanisms underlying their dissipation behavior remain unclear due to the limited understanding of how crosslinking density and local coordination influence energy redistribution and structural relaxation during impact. In this work, we developed a coarse-grained molecular dynamics model to investigate the impact induced energy conversion in STGs with different Si/B molar ratios. The simulations were validated by rheological experiments and accurately reproduced the nonlinear viscoelastic and shear thickening responses of system. The results show that energy evolution revealed a rapid transformation of kinetic energy into potential and internal deformation energy, followed by relaxation driven stabilization. Three coupled molecular processes-reversible coordination, chain conformational change, and orientational relaxation-were identified as key pathways that govern the dissipation efficiency and reversibility by regulating the partitioning of mechanical energy is partitioned between elastic storage, structural reconfiguration, and irreversible deformation. This work modulates the balance between elastic energy storage and irreversible deformation, thereby establishing a unified molecular framework that links network architecture to macroscopic impact performance.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129736"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146160848","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

Synthesis and properties of fluorine-free polyimides with ultrahigh Tg and excellent transparency based on the synergistic regulation of fluorenyl and methyl groups 基于芴基和甲基协同调节的超高Tg、高透明度无氟聚酰亚胺的合成及性能

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-07 DOI: 10.1016/j.polymer.2026.129720

Tianci Ma , Lei Yang , Jinglei Xing , Long Wang , Guofei Chen

{"title":"Synthesis and properties of fluorine-free polyimides with ultrahigh Tg and excellent transparency based on the synergistic regulation of fluorenyl and methyl groups","authors":"Tianci Ma , Lei Yang , Jinglei Xing , Long Wang , Guofei Chen","doi":"10.1016/j.polymer.2026.129720","DOIUrl":"10.1016/j.polymer.2026.129720","url":null,"abstract":"<div><div>It is a new challenge to develop fluorine-free transparent polyimides due to the prohibition of perfluoroalkyl and polyfluoroalkyl substances (PFAS). Hence, a series of fluorine-free polyimides were synthesized by 9,9-bis(3,4-dicarboxyphenyl) fluorene dianhydride (BPAF) with 3,3′-bis(methyl)-4,4′-benzidine (2,2′-DMBZ), 3,3′-bis(methyl)-4,4′-benzidine (3,3′-DMBZ), 1,4-diaminobenzene (<em>p</em>-PDA), 1,3-diaminobenzene (<em>m</em>-PDA), 2,6-toluenediamine (<em>m</em>-MPDA) and 2,4,6-trimethyl-1,3-phenylenediamine (<em>m</em>-TMPDA) through one-step and two-step methods. Then the corresponding polyimide films were obtained by solution casting. All polyimides exhibited high glass transition temperatures (<em>T</em><sub>g</sub>s) of 404-523 °C, coefficients of thermal expansion (CTEs) of 39-65 ppm/K, optical transmittances at 400 nm (<em>T</em><sub>400</sub>s) of 36-82 %, tensile strengths of 104.6-156.3 MPa, and tensile moduli of 2.6-4.3 GPa. The prepared fluorine-free polyimides had better performances than typical fluorine-containing polyimide derived from 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 2,2′-bis(trifluoromethyl)-4,4′-benzidine (TFDB). In particular, <strong>PI-6</strong> exhibited comprehensive properties with <em>T</em><sub>g</sub> of 523 °C, <em>T</em><sub>400</sub> of 82%, and CTE of 42 ppm/K.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129720"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129700","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

Twisted non-coplanar benzimidazole diamines enabling colorless, high-Tg polyimide films for flexible displays 扭曲非共面苯并咪唑二胺使无色，高tg聚酰亚胺薄膜柔性显示

IF 4.5 2区化学

Polymer Pub Date : 2026-03-19 Epub Date: 2026-02-07 DOI: 10.1016/j.polymer.2026.129719

Peng Yue , Dandan Li , Wei Wang , Youhai Yu , Guangtao Qian , Chunhai Chen

{"title":"Twisted non-coplanar benzimidazole diamines enabling colorless, high-Tg polyimide films for flexible displays","authors":"Peng Yue , Dandan Li , Wei Wang , Youhai Yu , Guangtao Qian , Chunhai Chen","doi":"10.1016/j.polymer.2026.129719","DOIUrl":"10.1016/j.polymer.2026.129719","url":null,"abstract":"<div><div>To achieve high-performance colorless polyimide (CPI) films, this study employed a molecular structure design strategy aimed at suppressing the charge transfer complex (CTC) effect between molecular chains by introducing twisted and non-coplanar structure into the polymer backbone. Drawing inspiration from previous research, three benzimidazole-based diamine monomers with twisted non-coplanar structures were designed and synthesized by modulating the relative positions of amino groups and the structures of substituents. These monomers were subsequently polymerized with two dianhydrides, namely 1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), yielding two series of polybenzimidazole-imides (PBIIs): semi-aromatic and fully aromatic polymers, respectively. The resulting semi-aromatic polymer films demonstrated a combination of excellent thermal resistance, with glass transition temperature (T<sub>g</sub>) exceeding 400 °C, and high optical transparency, exhibiting over 80% transmittance at 400 nm (T<sub>400</sub>). This work not only provides an effective molecular design strategy for developing high-performance CPI materials but also expands the application prospects of PBII materials in the field of high-temperature optical devices.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"348 ","pages":"Article 129719"},"PeriodicalIF":4.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135321","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

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