Ultra-heat resistance and low CTE polyimides with spirobis(indene)bis(benzoxazole)-benzimidazole unite for flexible substrate applications

IF 5.8 2区化学 Q1 POLYMER SCIENCE

European Polymer Journal Pub Date : 2025-03-31 DOI:10.1016/j.eurpolymj.2025.113923

Peng Xiao , Xiaojie He , Qinghua Lu

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引用次数: 0

Abstract

The advancement of new technologies has driven the demand for the development of higher-performance polyimides (PI), especially in terms of heat resistance, dimensional stability, and mechanical properties. In this study, four highly rigid, twisted diamine isomers featuring a spirobis(indene)bis(benzoxazole) structure were synthesized. By their co-polycondensation with 5-amino-2-(4-aminobenzene)-benzimidazole (PABZ) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) followed by thermal imidization, a series of PIs with benzoxazole and benzimidazole structures were prepared. Owing to the rigid and linear structure and the formation of intermolecular hydrogen bonding, the PI films showed ultrahigh heat resistance (T_g: 417–510 °C; T_d^5% = 514–562 °C) and excellent dimensional stability (CTE: 2.1–23.5 ppm/K). Meanwhile, they also demonstrate excellent mechanical properties, with a tensile strength of up to 238.5 MPa and an initial modulus of up to 6.8 GPa. These polyimide films have great application potential in flexible display substrates.

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超耐热和低CTE聚酰亚胺与spirobis(indene) - bis（苯并恶唑）-苯并咪唑结合在一起，用于柔性衬底应用

新技术的进步推动了对高性能聚酰亚胺（PI）的开发需求，特别是在耐热性、尺寸稳定性和机械性能方面。本研究合成了四种具有螺（茚）二（苯并恶唑）结构的高刚性、扭曲二胺异构体。通过与5-氨基-2-（4-氨基苯）-苯并咪唑（PABZ）和3,3 ',4,4 ' -联苯四羧酸二酐（BPDA）共缩聚，然后进行热亚酰化，制备了一系列具有苯并恶唑和苯并咪唑结构的pi。由于PI薄膜的刚性和线性结构以及分子间氢键的形成，使其具有超高的耐热性(Tg: 417-510℃；Td5% = 514-562°C)，尺寸稳定性极佳（CTE: 2.1-23.5 ppm/K）。同时，它们也表现出优异的力学性能，抗拉强度高达238.5 MPa，初始模量高达6.8 GPa。这些聚酰亚胺薄膜在柔性显示基板上具有很大的应用潜力。

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来源期刊

European Polymer Journal 化学-高分子科学

CiteScore

9.90

自引率

10.00%

发文量

691

审稿时长

23 days

期刊介绍： European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.