Polymer最新文献_第10页

Non-solvent preparation of polyurethane adhesive with capabilities of shape adaptive, harsh environment resistance and cryogenic durability 无溶剂制备具有形状适应性、耐恶劣环境和低温耐久性的聚氨酯胶粘剂

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-01-29 DOI: 10.1016/j.polymer.2026.129621

Sisi Cheng , Xuequan Ma , Meishan Fu , Dongqi Wang , Zhihong Wang , Xiaojing Dai , Jiacheng Xu , Jianwei Chen , Lijing Han , Ruoyu Zhang

{"title":"Non-solvent preparation of polyurethane adhesive with capabilities of shape adaptive, harsh environment resistance and cryogenic durability","authors":"Sisi Cheng , Xuequan Ma , Meishan Fu , Dongqi Wang , Zhihong Wang , Xiaojing Dai , Jiacheng Xu , Jianwei Chen , Lijing Han , Ruoyu Zhang","doi":"10.1016/j.polymer.2026.129621","DOIUrl":"10.1016/j.polymer.2026.129621","url":null,"abstract":"<div><div>Adhesives that can be used in harsh environments are usually prepared via complicate synthesis route and using of organic solvents, and they usually lack immediate adhesion and shape adaptive. In this work, non-isocyanate polyurethane using PDMS as the sole soft segment is prepared via a non-solvent route, and it was then crosslinked by the dynamic boronic ester bonds. The shape of the resulting adhesive can be quickly molded by hand, which facilitate its usage in sealing irregular damages. It also demonstrates long-term effectiveness after in-situ adhesion on various substrate types under harsh environmental conditions, including exposure to simulated seawater, pH = 1 hydrochloric acid, pH = 10 sodium hydroxide solution, and ethylene glycol. Its in-situ adhesion strength in liquid nitrogen (LN) can reach 7.1 MPa. When adhered in air and then stored in LN for 15 days, the adhesion strength was as high as ∼14 MPa. Moreover, the adhesive exhibited remarkable toughness at approximately −90 °C, as shown by its ability to support a 200 g weight dropped from a height of 180 cm, corresponding to an impact energy of 3.5 J. These tough and adhesive UD-BAs show high potential in damage sealing and aerospace travelling etc.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129621"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072855","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

Redshift phenomenon in the electroluminescence spectrum of nanodot matrix OLEDs 纳米点阵oled电致发光光谱中的红移现象

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-01-31 DOI: 10.1016/j.polymer.2026.129686

Wei Zhao , Jian-wu Zhang , Yin You , Jin-hui Song , Ao Zhang , Xu Li , Bo Song

{"title":"Redshift phenomenon in the electroluminescence spectrum of nanodot matrix OLEDs","authors":"Wei Zhao , Jian-wu Zhang , Yin You , Jin-hui Song , Ao Zhang , Xu Li , Bo Song","doi":"10.1016/j.polymer.2026.129686","DOIUrl":"10.1016/j.polymer.2026.129686","url":null,"abstract":"<div><div>OLEDs with light-emitting scales as small as hundreds of nanometers represent one of the future challenges in display technology. Here, through the introduction of an innovative structural design utilizing the polymer Poly (methyl methacrylate (PMMA), we have successfully designed and fabricated the nanodot matrix OLEDs (NMOLEDs) with individual light-emitting diameters reaching the hundreds of nanometers scale. It is observed that the light-emitting phenomenon of such small-sized OLEDs is examined under optical microscopy, and their micro-nano structures at key locations are analyzed using electron microscopy and atomic force microscopy. We discovered a significant red shift in the electroluminescence spectrum as the emission diameter decreased from 10 μm to 160 nm, experimentally ruling out microcavity effects. By simplifying the NMOLED structure into step-index fibers, we calculated the longitudinal and transverse electromagnetic field components and characteristic equations using Maxwell's equations. Finally, finite-difference time-domain simulations revealed that the nanostructures within the NMOLEDs absorb visible light at specific wavelengths, reducing or even blocking transmission. The transmission wavelength shifts toward the red end of the spectrum as the emission diameter decreases. This study further confirms the pivotal role of polymer PMMA in novel optoelectronic devices, providing technical guidance and theoretical support for the future development and application of nanoscale OLEDs. It also reveals the challenges and opportunities that lie ahead.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129686"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146095657","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

Exploring the elastic-plastic behavior of hydrogen bond cross-linked polymers, based on the principle of minimum energy and the slide of non-covalent cross-linking 基于最小能量原理和非共价交联滑动，探索氢键交联聚合物的弹塑性行为

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-02-02 DOI: 10.1016/j.polymer.2026.129689

Ziyu Xing , Xiaodong Wang , Xiaoling Hu , Rongguo Zhao

{"title":"Exploring the elastic-plastic behavior of hydrogen bond cross-linked polymers, based on the principle of minimum energy and the slide of non-covalent cross-linking","authors":"Ziyu Xing , Xiaodong Wang , Xiaoling Hu , Rongguo Zhao","doi":"10.1016/j.polymer.2026.129689","DOIUrl":"10.1016/j.polymer.2026.129689","url":null,"abstract":"<div><div>Hydrogen bond cross-linked polymers exhibit remarkable toughening, yet the molecular origin of their sliding and plasticity remains unclear. The changes in the mechanical behavior of polymers caused by the sliding of microscopic polymer chains have not yet been effectively understood. We develop a minimum free energy model for forced sliding of non-covalent cross-links and derive a closed-form expression for sliding free energy density by treating electrostatic and repulsive contributions on equal footing. This model predicts two distinct sliding states governed by the ratio of initial electrostatic energy to repulsive energy. The strong electrostatic interaction manifests as a conventional resistance-dependent sliding process, whereas the weak electrostatic interaction under applied load initially promotes hydrogen bond formation. We couple this sliding energy with conformational free energy obtained from Langevin chain statistics and the tube model to yield a total stress–strain response. Uniaxial tensile data for three material families are predicted with correlation coefficients. The theory quantitatively captures yield, necking, strain hardening, and the transition from entropy-dominated elasticity to slide-governed plasticity.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129689"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098192","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

Composition-directed fabrication of dual cross-linked bifunctional composites on fabrics for chemical removal of formaldehyde and amine air-pollutants 复合材料定向制备双交联双功能复合材料用于化学去除甲醛和胺类空气污染物

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-02-03 DOI: 10.1016/j.polymer.2026.129692

Mengyu Cao , Shanmei Luo , Xiaolong Yang , Jijie Li , Xiuping Liu , Jinhou Fang , Honglei Liu , Jingquan Liu

{"title":"Composition-directed fabrication of dual cross-linked bifunctional composites on fabrics for chemical removal of formaldehyde and amine air-pollutants","authors":"Mengyu Cao , Shanmei Luo , Xiaolong Yang , Jijie Li , Xiuping Liu , Jinhou Fang , Honglei Liu , Jingquan Liu","doi":"10.1016/j.polymer.2026.129692","DOIUrl":"10.1016/j.polymer.2026.129692","url":null,"abstract":"<div><div>With the advent of industrialization, urbanization, and the widespread use of chemicals, formaldehyde and ammonia have become typical indoor pollutants that pose a threat to human health and ecological safety. This study reports a “dual cross-linking” functionalized system based on polypropylene nonwoven fabric (NWF), which can efficiently remove formaldehyde and ammonia at room temperature through highly selective nucleophilic addition reactions between aminooxy/amino and aldehyde groups, with water as the sole by-product and no secondary pollutants. Initially, an OB-GA cross-linking network is achieved through the nucleophilic addition reaction between O,O'-(ethane-1,2-diyl)bis(hydroxylamine) dihydrochloride (OB) and glutaraldehyde (GA). Then, the OB-GA cross-linked polymer is stably loaded onto the surface of the fibers by the sodium alginate (SA)-calcium ion (Ca<sup>2+</sup>) crosslink mechanism, thereby successfully constructing NWF/SA/OB-GA composite. This dual cross-linking structure endows the material with high selectivity and high-capacity adsorption properties. More importantly, the composite can be regenerated under weakly acidic conditions, enabling reuse and reducing usage costs. Additionally, by adjusting the OB/GA molar ratio, the application of the composites can be customized. Under the N<sub>2</sub> flow rate of 1.0 L/min at 25 °C, 1 g of SA/OB-GA/8-2 composite (rich in aminooxy group) can remove 137 mg of formaldehyde within 24 h, while 1 g of SA/OB-GA/2–8 composite (rich in aldehyde group) can remove 123 mg of NH<sub>3</sub> within 24 h. This technology offers a controllable, efficient solution for air pollution purification applications.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129692"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146111006","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

Structural, optical, and electrical Studies of cobalt oxide incorporated chitosan/poly(vinyl alcohol) composite films 壳聚糖/聚乙烯醇氧化钴复合膜的结构、光学和电学研究

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-02-02 DOI: 10.1016/j.polymer.2026.129687

Mohamed Gouda , Mai M. Khalaf , Manal F. Abou Taleb , Mahmoud A. Abdelaziz , Hany M. Abd El-Lateef

{"title":"Structural, optical, and electrical Studies of cobalt oxide incorporated chitosan/poly(vinyl alcohol) composite films","authors":"Mohamed Gouda , Mai M. Khalaf , Manal F. Abou Taleb , Mahmoud A. Abdelaziz , Hany M. Abd El-Lateef","doi":"10.1016/j.polymer.2026.129687","DOIUrl":"10.1016/j.polymer.2026.129687","url":null,"abstract":"<div><div>Flexible, lightweight, and low-cost polymer-based materials are increasingly important for emerging electronic and optoelectronic technologies with reduced environmental impact. In this study, chitosan/poly(vinyl alcohol) (Cs/PVA) composite films incorporating different concentrations of cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) were fabricated. The novelty of this work lies in the systematic correlation between Co<sub>3</sub>O<sub>4</sub> content and the combined structural, optical, dielectric, electric modulus, and electrical conductivity responses of Cs/PVA composite films. Structural and morphological features were analyzed using XRD, FTIR, and SEM, confirming the successful incorporation of Co<sub>3</sub>O<sub>4</sub> within the polymer matrix. Optical measurements revealed a gradual reduction in the indirect band gap and an increase in the Urbach energy with increasing Co<sub>3</sub>O<sub>4</sub> content, indicating the formation of localized states and enhanced light absorption. Dielectric studies demonstrated a significant enhancement in permittivity and dielectric loss at low frequencies due to interfacial and space-charge polarization, while electric modulus analysis revealed concentration-dependent relaxation behavior. In addition, electrical conductivity increased progressively with increasing Co<sub>3</sub>O<sub>4</sub> loading, reflecting improved charge-transport pathways. These findings demonstrate that Co<sub>3</sub>O<sub>4</sub>-loaded Cs/PVA composite films are promising candidates for flexible dielectric devices, charge-storage components, sensors, and lightweight electronic systems.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129687"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146111007","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

When flexibility meets rigidity: Unlocking the potential of polysiloxane–silsesquioxane hybrids 当灵活性遇到刚性：释放聚硅氧烷-硅氧烷混合化合物的潜力

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-01-30 DOI: 10.1016/j.polymer.2026.129679

Katarzyna Mituła-Chmielowiec , Rafał Januszewski , Marek Nowicki , Beata Dudziec

{"title":"When flexibility meets rigidity: Unlocking the potential of polysiloxane–silsesquioxane hybrids","authors":"Katarzyna Mituła-Chmielowiec , Rafał Januszewski , Marek Nowicki , Beata Dudziec","doi":"10.1016/j.polymer.2026.129679","DOIUrl":"10.1016/j.polymer.2026.129679","url":null,"abstract":"<div><div>Hybrid polysiloxanes (PS) incorporating silsesquioxane (SQ) cages offer promising opportunities for advanced materials design. However, the influence of SQ structure on PS properties remains underexplored. In this study, we investigated how the inert substituent type on the SQ core (iBu <em>vs.</em> Ph) and the length of the linker connecting the cage and PS backbone govern thermal, mechanical, and morphological behavior of the resulting materials. Microscopic, thermogravimetric, and nanomechanical analyses revealed clear structure-properties relationships. Short linkers provided superior thermal stability, while phenyl-substituted SQs outperform iBu analogues, owing to aromatic rigidity and oxidative resistance. Nanoindentation confirmed that Ph-substituted SQs affect exceptional stiffness and hardness, with 1-PhT<sub>8</sub>@PS1 achieving a Young's modulus of 10.35 GPa and a hardness of 162 MPa. These values are among the highest reported for SQ-modified polysiloxanes. Surface and swelling studies further highlighted the role of linker flexibility and SQ architecture in controlling morphology, network density, and solvent uptake (up to <em>ca.</em> 1240% in CHCl<sub>3</sub> and 840% in THF). Building on current knowledge in the field, this work presents a systematic evaluation of SQ architecture in polysiloxane hybrids and lays the groundwork for the rational design of application-tailored, high-performance hybrid materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129679"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089801","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

Dynamically cross-linked polyethylene cable insulation with superior wide-temperature-range dielectric stability and reprocessability 动态交联聚乙烯电缆绝缘，具有优越的宽温度范围介电稳定性和可再加工性

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-01-31 DOI: 10.1016/j.polymer.2026.129685

Zhuolin Zhang , Haoran Sui , Zelin Zhang , Kaiying Chang , Youshen Wu , Jian Gao , Kai Yang , Peng Zhao , Benhong Ouyang , Jianying Li , Kangning Wu

{"title":"Dynamically cross-linked polyethylene cable insulation with superior wide-temperature-range dielectric stability and reprocessability","authors":"Zhuolin Zhang , Haoran Sui , Zelin Zhang , Kaiying Chang , Youshen Wu , Jian Gao , Kai Yang , Peng Zhao , Benhong Ouyang , Jianying Li , Kangning Wu","doi":"10.1016/j.polymer.2026.129685","DOIUrl":"10.1016/j.polymer.2026.129685","url":null,"abstract":"<div><div>High-voltage direct-current (HVDC) cables are essential for reliable and efficient transmission of large-scale renewable energy, while it has been an obstacle to develop high-performance insulating materials. Specifically, achieving simultaneous suppression of space charge and stabilization of conductivity across a wide temperature range has remained elusive. Here, we prepared dynamically cross-linked polyethylene (PE-SH<sub><em>x</em></sub>) samples through a byproduct-free thiol-anhydride click-like reaction to address this contradiction. Reversible thioester bonds construct a recyclable and repairable network, while functioning as thermally robust polar traps. The optimized PE-SH<sub>100</sub> sample exhibited comprehensive improvements over the state-of-art commercial XLPE. Its conductivity was reduced by 47% at 30 °C and 93% at 90 °C with a sufficiently lowed activation energy of 0.27 eV. In addition, space charge accumulation was suppressed by 94% and electric field distortion remained below 5% even at 90 °C. This study established dynamic thioester bonds as an effective molecular strategy to reconcile trap regulation with conductivity stabilization, thereby endowing next-generation HVDC cable insulation with superior electrical insulation, wide-temperature-range stability, and reprocessability.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129685"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146095659","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

Enhancing the impact resistance and damage tolerance of 3D fibre-reinforced thermoplastic composites through tri-block copolymers matrix toughening 通过三嵌段共聚物基体增韧提高三维纤维增强热塑性复合材料的抗冲击性和损伤容限

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-01-31 DOI: 10.1016/j.polymer.2026.129683

S.M. Hussnain , S.Z.H. Shah , M.Z. Hussain , P.S.M. Megat-Yusoff , Syed Zahid Hussain

{"title":"Enhancing the impact resistance and damage tolerance of 3D fibre-reinforced thermoplastic composites through tri-block copolymers matrix toughening","authors":"S.M. Hussnain , S.Z.H. Shah , M.Z. Hussain , P.S.M. Megat-Yusoff , Syed Zahid Hussain","doi":"10.1016/j.polymer.2026.129683","DOIUrl":"10.1016/j.polymer.2026.129683","url":null,"abstract":"<div><div>Enhancing the impact tolerance and damage resistance of fibre-reinforced composites (FRCs) is critical to ensure their durability and reliability in advanced structural applications. To address this, the present study investigates the effect of triblock copolymer (TBC) on the low-velocity impact (LVI) and compression-after-impact (CAI) performance of resin-infused 3D-FRCs. The thermoplastic resin (Elium®) was modified with TBC using different weight percentages, i.e., 10%, 15%, and 20%. Pristine and TBC-reinforced 3D-FRCs were subjected to three different impact energies, i.e., 30 J, 60 J, and 90 J, followed by CAI tests to assess their damage tolerance. The LVI results showed that the 15% TBC configuration exhibited superior impact response, with a 7.5% increase in peak force and an 11% reduction in deflection at 30 J, and up to 14% higher peak force at 60 J compared to the pristine 3D-FRCs. This enhancement is attributed to the uniform dispersion of TBC particles and controlled agglomeration, which improves stress distribution. The CAI tests revealed a significant improvement in post-impact compressive strength, with the 15% TBC specimens exhibiting the highest performance. Field emission scanning electron microscopy (FESEM) images revealed agglomerated and residual TBC particles within the modified composites, confirming their influence on fracture behaviour. SEM images further depict a transition from brittle interlaminar and intralaminar cracking in pristine specimens to a relatively ductile plastic kinking and kink-band formation in TBC-reinforced composites, demonstrating enhanced matrix ductility and energy absorption capability. This study demonstrates the potential of TBC for improving matrix toughness and guiding the development of impact-tolerant structural composites.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129683"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146095660","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

A chemically robust, compatible, and low-swelling ionomer blend for medium-temperature proton conduction: old dogs with a new trick 一种化学上稳定、兼容、低膨胀的离子混合物，用于中温质子传导：老狗有了新把戏

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-02-02 DOI: 10.1016/j.polymer.2026.129690

Zhuowei Qu, Zihan Xia, Bo Zhang, Xiaohan Li, Su Zhang, Chengzhi Cui, Peng Sun, Zhongfang Li

{"title":"A chemically robust, compatible, and low-swelling ionomer blend for medium-temperature proton conduction: old dogs with a new trick","authors":"Zhuowei Qu, Zihan Xia, Bo Zhang, Xiaohan Li, Su Zhang, Chengzhi Cui, Peng Sun, Zhongfang Li","doi":"10.1016/j.polymer.2026.129690","DOIUrl":"10.1016/j.polymer.2026.129690","url":null,"abstract":"<div><div>Medium-temperature proton exchange membranes (PEMs) with high proton conductivity and low fuel crossover have received ever-growing research interest. Herein, a novel ionomer blend was designed and developed to address the issues that traditional PEMs are facing with: low membrane selectivity, trade-off between proton conductivity and mechanical strength, chemical degradation, phase-separation, and over-swelling. A poly(1,2-benzimidazole) (PBESK) is blended with a sulfonated polymer (SPEEK) to achieve good compatibility ascribed to acid-base interactions, π-π interactions, and hydrogen bonds. This membrane exhibits better mechanical strength, lower swelling ratio, and better durability of proton conductivity than SPEEK while displaying higher chemical stability than both PBESK and SPEEK. At 180 °C, the proton conductivity of the PBESK/SPEEK(60%) membrane reaches 0.147 S cm<sup>−1</sup>, 0.053 S cm<sup>−1</sup>, and 0.00583 S cm<sup>−1</sup> at 100% RH, 50% RH, and 0% RH, respectively. This membrane also shows low methanol permeability, low H<sub>2</sub>/O<sub>2</sub> permeance, and thus high membrane selectivity. This effective design paves the way for the development of next-generation medium-temperature PEMs.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129690"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098191","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

CO2-assisted synthesis of bio-based furandicarboxylic acid for high-performance poly(ether-ester) adhesives 高性能聚醚酯胶粘剂用生物基呋喃二甲酸的co2辅助合成

IF 4.5 2区化学

Polymer Pub Date : 2026-03-06 Epub Date: 2026-02-03 DOI: 10.1016/j.polymer.2026.129691

Yingying Liu, Lin Peng, Lu Li, Rui Wang

{"title":"CO2-assisted synthesis of bio-based furandicarboxylic acid for high-performance poly(ether-ester) adhesives","authors":"Yingying Liu, Lin Peng, Lu Li, Rui Wang","doi":"10.1016/j.polymer.2026.129691","DOIUrl":"10.1016/j.polymer.2026.129691","url":null,"abstract":"<div><div>A novel, fully bio-based poly(ether-ester) (PEE) was synthesized by means of a one-pot, two-component melt polycondensation employing renewable furandicarboxylic acid (FDCA) and 1,3-propanediol. Notably, a practical and scaled-up process for converting furfural to FDCA was demonstrated via K<sub>2</sub>CO<sub>3</sub>-promoted C–H carboxylation of furoate in a paraffin medium, achieving a yield of 77%. The novel poly(ether-ester) displayed excellent ductility and gas barrier properties, in addition to adhesiveness, arising from the combined effect of the FDCA and ether linkage building blocks. A comparative study was conducted on the adhesive properties of this series of poly(ether-ester)s and a commercial high-barrier encapsulation material ethylene-vinyl acetate (EVA). In particular, the PEE exhibited faster bonding with the glass substrate at a lower temperature (85 °C vs. 140 °C for EVA), achieving a maximum bonding strength of 10.8 MPa, whereas that of EVA was 7.3 MPa. Furthermore, the PEE demonstrated significantly superior retention of its adhesive properties upon exposure to various environmental conditions, including acids, alkalis, seawater, and organic solvents. The PEE film also exhibited water vapor barrier property comparable to that of EVA. We anticipate that this new family of bio-based materials will substantially enrich the structural diversity of FDCA-based copolyesters and establish their applicability in advanced encapsulation technologies.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"347 ","pages":"Article 129691"},"PeriodicalIF":4.5,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146101793","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