IF 4.6 2区化学

Polymer Pub Date : 2025-10-01 DOI: 10.1016/j.polymer.2025.129145

Van Tron Tran

{"title":"Evaluating the effect of strong binding affinity ions on mechanical properties, electrical conductivity, and weldability of conductive alginate-based hydrogels","authors":"Van Tron Tran","doi":"10.1016/j.polymer.2025.129145","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129145","url":null,"abstract":"Next-generation applications, such as actuators, sensors, soft robotics, and electronic devices, require flexible and wearable materials with robust mechanical properties, exceptional electrical conductivity, and complex designability. Additionally, using sustainable substances as alternatives to conventional ones is crucial for environmental preservation and minimizing fossil fuel usage. In this study, conductive hydrogels based on naturally derived materials, including alginate and activated charcoal (AC), have been successfully developed. They are created using an ion diffusion method, followed by drying and rehydration techniques, and an ion exchange process. The effect of strong binding affinity ions, such as Zn<sup>2+</sup>, Ba<sup>2+</sup>, Cu<sup>2+</sup>, and Al<sup>3+</sup>, on the mechanical performances, electrical conductivity, and weldability of the hydrogels is assessed transparently. The findings indicate that the hydrogel prepared with Ba<sup>2+</sup> exhibits remarkable mechanical properties (Young’s modulus: ∼106.83 MPa, tensile strength: ∼10.31 MPa, and work of extension: ∼8.17 MJ·m<sup>−3</sup>). Meanwhile, Zn<sup>2+</sup> imparts favorable electrical conductivity (∼0.537 mS·cm<sup>−1</sup>) and excellent welding efficiency (adhesive strength: ∼1.14 MPa) to the gel. Monovalent ions, such as Li<sup>+</sup>, can be incorporated into the hydrogels to enhance conductivity (∼2.388 mS·cm<sup>−1</sup>), yet their presence has a negligible effect on the gels’ mechanical properties. Furthermore, the gels are successfully utilized to fabricate flexible and wearable electrical components, such as electrical circuits. Considering these capabilities, the developed conductive hydrogels hold potential for applications in electronics and load-bearing systems.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"22 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195343","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

Boroxy-modified UV dual-cure ladder-like polysiloxane coatings with excellent hardness, UV resistance 硼氧改性UV双固化阶梯状聚硅氧烷涂料具有优异的硬度，耐紫外线

IF 4.5 2区化学

Polymer Pub Date : 2025-09-30 DOI: 10.1016/j.polymer.2025.129139

Tianyu Pan , Yuewen Huang , Hui Liu , Tianyi Xu , Yunlong Wang , Binzhi Wang , Jinrong He , Bin Wang

{"title":"Boroxy-modified UV dual-cure ladder-like polysiloxane coatings with excellent hardness, UV resistance","authors":"Tianyu Pan , Yuewen Huang , Hui Liu , Tianyi Xu , Yunlong Wang , Binzhi Wang , Jinrong He , Bin Wang","doi":"10.1016/j.polymer.2025.129139","DOIUrl":"10.1016/j.polymer.2025.129139","url":null,"abstract":"<div><div>Protective hard coatings are crucial for the screens of electronic devices; however, conventional polymer coatings often face limitations in hardness, self-cleaning ability, and fingerprint resistance. In this study, we developed a novel UV dual-curable ladder-like polysilsesquioxane (LPSQ) coating, modified with boroxyl groups, to improve its protective performance. LPSQ was synthesized via a sol-gel process using controlled ratios of phenyltrimethoxysilane (PTMS), 3-methacryloxypropyltrimethoxysilane (KH-570), and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS). The subsequent modification with 4-vinylphenylboronic acid (4-VPBA) introduced a boroxyl network through thermal dehydration. The resulting LPSQ-co-VPBA coating exhibited exceptional mechanical properties, achieving a pencil hardness of up to 8H and excellent adhesion (Grade 0). Notably, the LPSQ153-co-VPBA coating demonstrated extraordinary hardness of 1.83 GPa. Furthermore, the modified coating exhibited enhanced thermal stability, with its decomposition temperature rising from 200 °C to 350 °C, as well as superior UV shielding (41.2 % increase in absorption) and excellent visible light transmittance. Additionally, the coating displayed remarkable self-cleaning and anti-fingerprint properties, with artificial fingerprint liquid sliding off in just 1 s. These findings underscore the potential of boroxyl-modified LPSQ coatings as high-performance protective materials for next-generation electronic device screens. It offer superior hardness, optical clarity, thermal stability, and self-cleaning properties.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"339 ","pages":"Article 129139"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189403","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

Mechanism of structural evolution during thermal stretching of PEEK PEEK热拉伸过程中结构演化机理研究

IF 4.6 2区化学

Polymer Pub Date : 2025-09-30 DOI: 10.1016/j.polymer.2025.129156

Suhao Long, Weijun Miao, Zongbao Wang

{"title":"Mechanism of structural evolution during thermal stretching of PEEK","authors":"Suhao Long, Weijun Miao, Zongbao Wang","doi":"10.1016/j.polymer.2025.129156","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129156","url":null,"abstract":"Poly (ether ether ketone) (PEEK) is widely utilized due to its outstanding properties. Elucidating the conformational changes of PEEK under mechanical stress and their impact on crystalline morphology will offer an in-depth and systematic insight into the processing behavior of the poly (arylether ketone ketone) family. This study utilizes in-situ WAXD/SAXS and FTIR analyses, complemented by DSC characterization, to systematically explore the mechanism of aggregated state structure evolution in PEEK films subjected to high-temperature stress fields. Findings from the in-situ WAXD/SAXS tests indicate that the PEEK molecular chains orient along the direction of applied stress, which induces crystal fragmentation or melting. During the strain-hardening stage of thermal stretching process, the molecular orientation increases linearly with strain, along with the formation of form II crystalline structures. Higher strain and elevated stretching temperatures favor the formation of form II crystals. According to in-situ FTIR measurements, the movement of ether bonds during stretching triggered conformational changes that strengthened intermolecular interactions within the PEEK molecular chains. The DSC analysis demonstrated that form II crystals possess a higher melting temperature and enhanced stability. This work not only enriches the theoretical system of poly (arylether ketone ketone) series, but also provides a detailed theoretical basis for regulating the processing performance of PEEK.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"28 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189406","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

Hyperbranched polysiloxane junction points with dual roles in multi-crosslinked BT resin networks: Synergistic engineering of ultrahigh toughness, dielectric performance, and thermal stability 在多重交联BT树脂网络中具有双重作用的超支化聚硅氧烷结点：超高韧性、介电性能和热稳定性的协同工程

IF 4.5 2区化学

Polymer Pub Date : 2025-09-30 DOI: 10.1016/j.polymer.2025.129144

Zhixuan Zhang , Chaofeng Chen , Wendong Chen , Ailing Peng , Wenjin Chen , Xiaobo Liu , Yumin Huang

{"title":"Hyperbranched polysiloxane junction points with dual roles in multi-crosslinked BT resin networks: Synergistic engineering of ultrahigh toughness, dielectric performance, and thermal stability","authors":"Zhixuan Zhang , Chaofeng Chen , Wendong Chen , Ailing Peng , Wenjin Chen , Xiaobo Liu , Yumin Huang","doi":"10.1016/j.polymer.2025.129144","DOIUrl":"10.1016/j.polymer.2025.129144","url":null,"abstract":"<div><div>Microelectronics is rapidly advancing toward miniaturization and high-density integration. Consequently, there is a growing demand for structural-functional integrated materials with excellent comprehensive properties, particularly in cutting-edge applications like printed circuit boards. In this work, a hyperbranched polysiloxane (HBPSi) was synthesized and incorporated into a bismaleimide-triazine (BT) resin matrix. The modified bismaleimide-triazine (BT) resin features a multi-crosslinked network with HBPSi as junctions. Benefiting from the dual-role synergy of amino groups and hyperbranched architecture of HBPSi, the modified BT resin demonstrates exceptional thermal stability, significantly enhanced hydrophobicity, a low dielectric constant of 3.21 and dielectric loss of 0.016 (at 1 MHz), showing great potential for electronic applications. Based on this, the structural-functional integrated composites by incorporating aramid fiber reinforcement were fabricated. These composites not only exhibit outstanding mechanical properties (impact strength exceeding 100 kJ/m<sup>2</sup>) but also maintain excellent dielectric performance. This research establishes a simple yet effective method for manufacturing high-performance structural-functional integrated dielectric materials, thereby expanding their potential applications in next-generation electronic devices.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"339 ","pages":"Article 129144"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195346","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

Quantitative HPLC–mass spectrometry analysis shows the drastic impact of the composition of aqueous and biochemical media on the release of soluble hydrolysis products from submicron polycaprolactone 定量hplc -质谱分析表明，水溶液和生化介质的组成对亚微米聚己内酯可溶性水解产物的释放有很大影响

IF 4.5 2区化学

Polymer Pub Date : 2025-09-30 DOI: 10.1016/j.polymer.2025.129150

Maëva Boulée, Marie Carrière, Thierry Douki

{"title":"Quantitative HPLC–mass spectrometry analysis shows the drastic impact of the composition of aqueous and biochemical media on the release of soluble hydrolysis products from submicron polycaprolactone","authors":"Maëva Boulée, Marie Carrière, Thierry Douki","doi":"10.1016/j.polymer.2025.129150","DOIUrl":"10.1016/j.polymer.2025.129150","url":null,"abstract":"<div><div>Accumulation of micro- and nanoplastics in the environment is a major concern, and biodegradable polymers are receiving growing interest as an alternative to more stable material. It remains yet to identify the degradation products of biodegradable plastics. In the present work, we studied polycaprolactone (PCL), a polymer used in a growing number of packaging and medical applications. We gathered quantitative data on the release of soluble oligomers from submicrometric PCL particles (100–1000 μm in diameter) throughout their degradation. This was made possible by the synthesis of well-characterized PCL oligomers, which were then used for the development of HPLC-mass spectrometry methods. The assay was first applied to degradation studies performed in aqueous media, in relationship to environmental degradation. We observed an influence of temperature and salinity, and obtained specific information on the mechanism of release of PCL hydrolysis products at the sub-micrometric scale. The same approach was then applied to study PCL degradation in cell culture media used in toxicity studies. Oligomers arising from the hydrolysis of PCL particles were released in both the presence and the absence of cells. The size distribution under these conditions was shifted to shorter oligomers than in water. This observation, supported by experiments on synthetic PCL oligomers, pointed to a significant contribution of fetal calf serum used as an additive in cell culture medium. The bulk of these results show that hydrolysis of submicrometric PCL particles and the subsequent production of oligomers is an efficient process that is strongly modulated by the degradation medium.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"339 ","pages":"Article 129150"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189405","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

Investigation of in-situ Stress Relaxation Behavior and Structural Evolution in Stretched Polylactic Acid Films during Constrained Annealing 拉伸聚乳酸薄膜在约束退火过程中的原位应力松弛行为及结构演化研究

IF 4.6 2区化学

Polymer Pub Date : 2025-09-30 DOI: 10.1016/j.polymer.2025.129154

Shi-Juan Ding, Ling-Na Cui, Ke-Feng Xie, Yue-Jun Liu

{"title":"Investigation of in-situ Stress Relaxation Behavior and Structural Evolution in Stretched Polylactic Acid Films during Constrained Annealing","authors":"Shi-Juan Ding, Ling-Na Cui, Ke-Feng Xie, Yue-Jun Liu","doi":"10.1016/j.polymer.2025.129154","DOIUrl":"https://doi.org/10.1016/j.polymer.2025.129154","url":null,"abstract":"Polylactic acid (PLA) films face challenges in controlling stress relaxation during thermal processing, impacting dimensional stability and performance. This study elucidates the stress relaxation mechanisms of PLA films reinforced with zinc phenylphosphonate (PPZn) and calcium sulfate whisker (CSW) during constrained annealing following uniaxial (UCS) or biaxial (BS) stretching. By systematically comparing PLA/PPZn/CSW films stretched at controlled ratios (2.0-5.0), in-situ measurements reveal significantly slower stress relaxation in BS films compared to UCS films, especially at higher ratios. Comprehensive characterizations (X-ray scattering, Fourier transform infrared spectroscopy) attribute this divergence to biaxial orientation-induced molecular three-dimensional network confinement, evidenced by a 15°C elevation in glass transition temperature and enhanced amorphous phase rigidity. Structural evolution tracking confirms self-reinforcing crystal-amorphous interfacial barriers, with lamellar thickness increasing by 1.7 nm and crystallinity rising from 28% to 35% under maximum stretching. Quantitative analysis using generalized Maxwell modeling with continuous and discrete relaxation time spectra provides new insights into the viscoelastic behavior and network stability. These findings establish a clear structure-property relationship addressing critical challenges in stress relaxation control, offering a practical strategy to optimize PLA film performance for advanced packaging and flexible electronics applications.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"6 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189404","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 an anticoagulant coating mimicking extracellular matrix for better surface blood compatibility and endothelialization of polyurethanes 构建一种模拟细胞外基质的抗凝涂层，以获得更好的表面血液相容性和聚氨酯的内皮化

IF 4.5 2区化学

Polymer Pub Date : 2025-09-30 DOI: 10.1016/j.polymer.2025.129172

Jie Chen , Naiquan Yang , Yi Xu , Yan Ji , Zheng Qian , Jing Sun , Qiuyang Zhang , Qingping Xiong , Changjiang Pan

{"title":"Construction of an anticoagulant coating mimicking extracellular matrix for better surface blood compatibility and endothelialization of polyurethanes","authors":"Jie Chen , Naiquan Yang , Yi Xu , Yan Ji , Zheng Qian , Jing Sun , Qiuyang Zhang , Qingping Xiong , Changjiang Pan","doi":"10.1016/j.polymer.2025.129172","DOIUrl":"10.1016/j.polymer.2025.129172","url":null,"abstract":"<div><div>Polyurethane (PU) is widely used in cardiovascular implant devices. However, the surface hydrophilicity and bioactivity of polyurethanes are relatively insufficient, which can easily lead to non-specific protein adsorption, thrombosis, intimal hyperplasia, and endothelial dysfunction after implantation, thereby limiting their further clinical application. To address these constraints, the tannic acid/polylysine was first constructed on the polyurethane substrate to improve surface hydrophilicity while introducing surface amino groups. Then, heparin/laminin anticoagulant coating mimicking extracellular matrix (ECM) was further prepared through electrostatic adsorption and amide reaction. The modified coating significantly improved the wetting property of the PU surface, selectively promoted the adsorption of albumin while inhibiting the absorption of fibrinogen, and prevented platelet adhesion and activation, resulting in a notable boost in anticoagulant functionality. In addition, the bionic coating significantly enhanced endothelial cell (EC) adhesion, proliferation, and functional expression while effectively suppressing these processes in smooth muscle cells (SMCs), demonstrating its potential for promoting endothelial regeneration. The ECM-inspired coating developed in this study provides a novel solution for endowing blood-contacting polyurethanes with both endothelial regeneration and anticoagulant properties.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"339 ","pages":"Article 129172"},"PeriodicalIF":4.5,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195345","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 vat photopolymerization–assisted multi-material printing method: Enabling good interface bonding and multi-function structure design 一种还原光聚合辅助多材料打印方法：实现良好的界面粘合和多功能结构设计

IF 4.5 2区化学

Polymer Pub Date : 2025-09-29 DOI: 10.1016/j.polymer.2025.129147

Lu Yang , Zesen Cui , Meihe Zhang , Yuzhao Qiang , Ruiqi Hu , Chao Zhang

{"title":"A vat photopolymerization–assisted multi-material printing method: Enabling good interface bonding and multi-function structure design","authors":"Lu Yang , Zesen Cui , Meihe Zhang , Yuzhao Qiang , Ruiqi Hu , Chao Zhang","doi":"10.1016/j.polymer.2025.129147","DOIUrl":"10.1016/j.polymer.2025.129147","url":null,"abstract":"<div><div>Multi-material structures have been widely used in aerospace, medical, food engineering and other fields owing to their excellent mechanical properties. However, the fabrication of intricate multi-material structural components through three-dimensional (3D) printing technology presents a challenging task. While some 3D printing technologies are capable of fabricating multi-material structures, issues related to insufficient precision and low efficiency often arise. In this work, a novel multi-material vat photopolymerization 3D printing technique is proposed. The proposed printing technology integrates digital light processing curing technology with a multi-material delivery system to facilitate the efficient and high-quality 3D fabrication of complex structures using multiple materials. Therefore, it can not only facilitate the production of complex multi-material structures but also preserve the high resolution and printing efficiency. Using the proposed 3D printing system, the mechanical properties of the multi-material specimens were examined, and a strong correlation was found between the interface bonding strength and the printing orientation. Finally, the efficiency and application potential of this printing technique was illustrated through some exploratory product applications in energy absorption, electromagnetic shielding, and flexible sensing.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"339 ","pages":"Article 129147"},"PeriodicalIF":4.5,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145183035","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

Influence of Sodium Ion Content on the Structure and Mechanical Properties of Polyethylene Methacrylic Acid Ionomers 钠离子含量对聚甲基丙烯酸离聚体结构和力学性能的影响

IF 4.6 2区化学

Polymer Pub Date : 2025-09-29 DOI: 10.1016/j.polymer.2025.129152

Jiaqi Zhang, Xiao Cao, Li Peng, Gang Sun, Xianbo Huang, Quan Chen

引用次数: 0

Thermal cross-linking mechanism of polyhydroxyalkanoates with vinyl unit in their side chains 侧链含乙烯基的聚羟基烷酸酯的热交联机理

IF 4.5 2区化学

Polymer Pub Date : 2025-09-29 DOI: 10.1016/j.polymer.2025.129164

Sumire Ogura , Jobu Tateiwa , Taizo Kabe , Yuki Miyahara , Takeharu Tsuge , Tadahisa Iwata

引用次数: 0

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