基于动态共价键的热塑性聚酰亚胺的构造和自修复性能

IF 3.1 4区工程技术 Q2 POLYMER SCIENCE

Polymers for Advanced Technologies Pub Date : 2024-07-13 DOI:10.1002/pat.6509

Yuanjie Gao, Jiahao Shi, Xiaorui Zhang, Ling Weng, Xue Sun, Laiweiqing Liu

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引用次数: 0

摘要

聚酰亚胺表面在制造和使用过程中受到的机械损伤可能是决定材料性能和寿命的关键因素。为了解决这个问题，本研究通过异氰酸酯和酸酐的共聚制备了热塑性聚酰亚胺（TPI）薄膜，这种薄膜在受到机械损伤后具有卓越的自修复能力。此外，聚酰亚胺薄膜在自我修复后仍能保持其优异的拉伸强度（90 兆帕）和杨氏模量（E）（3 千兆帕）、高热稳定性（玻璃化转变温度（Tg）220°C）和优异的绝缘性能（击穿强度（Eb）180 千伏/毫米）。在热塑性树脂基体中适当引入交联结构和柔性基团，不仅能赋予材料自愈合能力，还能保持其优异的机械性能。直接共聚和独特的自愈合能力使其成为应对自愈合挑战的适当策略。

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Construction and self‐healing properties of thermoplastic polyimide based on dynamic covalent bonding

Mechanical damage to the surface of polyimide during manufacture and utilization may act as critical determinants of the properties and longevity of the material. In order to address this issue, this study prepared thermoplastic polyimide (TPI) films through the copolymerization of isocyanate and acid anhydride, which possesses superior self‐healing ability after being mechanical damaged. Moreover, polyimide films still retain its exceptional tensile strength (>90 MPa) with Young's modulus (E) (>3 GPa), high thermal stability (glass transition temperature (Tg) >220°C), and excellent insulation performance (breakdown strength (Eb) >180 kV/mm) after self‐healing. Introducing cross‐linked structures and flexible groups into the thermoplastic resin matrix appropriately not only imparts self‐healing capabilities to the material but also retains its excellent mechanical properties. The combination of straightforward copolymerization and distinctive self‐healing prowess renders it an appropriate strategy for confronting self‐healing challenges.

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来源期刊

Polymers for Advanced Technologies 工程技术-高分子科学

CiteScore

6.20

自引率

5.90%

发文量

337

审稿时长

2.1 months

期刊介绍： Polymers for Advanced Technologies is published in response to recent significant changes in the patterns of materials research and development. Worldwide attention has been focused on the critical importance of materials in the creation of new devices and systems. It is now recognized that materials are often the limiting factor in bringing a new technical concept to fruition and that polymers are often the materials of choice in these demanding applications. A significant portion of the polymer research ongoing in the world is directly or indirectly related to the solution of complex, interdisciplinary problems whose successful resolution is necessary for achievement of broad system objectives. Polymers for Advanced Technologies is focused to the interest of scientists and engineers from academia and industry who are participating in these new areas of polymer research and development. It is the intent of this journal to impact the polymer related advanced technologies to meet the challenge of the twenty-first century. Polymers for Advanced Technologies aims at encouraging innovation, invention, imagination and creativity by providing a broad interdisciplinary platform for the presentation of new research and development concepts, theories and results which reflect the changing image and pace of modern polymer science and technology. Polymers for Advanced Technologies aims at becoming the central organ of the new multi-disciplinary polymer oriented materials science of the highest scientific standards. It will publish original research papers on finished studies; communications limited to five typewritten pages plus three illustrations, containing experimental details; review articles of up to 40 pages; letters to the editor and book reviews. Review articles will normally be published by invitation. The Editor-in-Chief welcomes suggestions for reviews.