Comprehensive properties analysis of epoxy composites synergistically toughened with liquid nitrile rubber and polyethersulfone

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2024-11-08 DOI:10.1016/j.coco.2024.102154

Chuang Wang , XinFa Yang , HaoLin Zhang , Chi Chen , ZaiQin Zhang , He Li

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引用次数: 0

Abstract

In this paper, epoxy resin (EP) composites with different phase structures were prepared by introducing hydroxyl-terminated liquid nitrile rubber (HTBN) and hydroxyl-terminated polyethersulfone (PES) individually or simultaneously into the resin matrix. The results revealed that the rational distribution of phase structure of rigid PES and flexible HTBN can effectively contributed to the enhancement in their mechanical and electrical insulation strengths. The synergistic effect of the two reinforcing fillers granted the optimized ternary composite a tougher structural network, leading to significant improvements of 73.13 % and 18.98 % in mechanical impact strength and electrical breakdown strength, respectively, compared to the pristine EP. Furthermore, compared to HTBN, PES exhibited inhibited HTBN dielectric interfacial polarization and EP molecular chain segment relaxation, resulting in decreased dielectric constant and loss in the composites. This study provide insights into the dielectric properties and design strategies for the development of resin-based dielectric materials, ensuring their broader applicability.

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液态丁腈橡胶和聚醚砜协同增韧环氧树脂复合材料的综合性能分析

本文通过在树脂基体中单独或同时引入羟基封端液态丁腈橡胶（HTBN）和羟基封端聚醚砜（PES），制备了具有不同相结构的环氧树脂（EP）复合材料。研究结果表明，刚性 PES 和柔性 HTBN 相结构的合理分布能有效提高它们的机械和电气绝缘强度。两种增强填料的协同作用使优化后的三元复合材料具有更坚韧的结构网络，与原始 EP 相比，机械冲击强度和电击穿强度分别显著提高了 73.13% 和 18.98%。此外，与 HTBN 相比，PES 可抑制 HTBN 介电界面极化和 EP 分子链段松弛，从而降低复合材料的介电常数和损耗。这项研究为开发树脂基介电材料提供了介电特性和设计策略方面的见解，从而确保其具有更广泛的适用性。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.