新型可回收环氧树脂,具有可释放的残余应力、协同增强的介电性能和愈合能力

IF 4.1 2区 化学 Q2 POLYMER SCIENCE Polymer Pub Date : 2024-08-31 DOI:10.1016/j.polymer.2024.127569
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引用次数: 0

摘要

在环氧绝缘材料的整个生命周期中,如何通过减少制造过程中的残余应力、修复应用过程中的损伤以及退役后的回收利用来提高其性能一直是一个挑战。本文通过引入动态硫代氨基甲酸酯键(DTB),成功开发了一种新型可回收环氧树脂(SEP),它具有可释放残余应力、协同增强的介电性能和愈合能力。SEP 在低于玻璃化转变温度(Tg)的 30 °C 下退火 8 小时后,残余应力减少了 45%,而机械性能保持不变。SEP 的介电性能和损伤愈合能力也得到了协同改善。SEP 的电击穿损伤愈合效率高达 94.4%,同时其介电性能也优于商用环氧树脂。此外,SEP 还具有良好的可回收性,包括可再加工性和可降解性。所有这些优异性能都归因于热刺激引发的 DTB 解离和重组。这项工作为环氧树脂材料整个生命周期中的一系列问题提供了有效的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Novel recyclable epoxy resin with releasable residual stress and synergistically enhanced dielectric properties and healing ability

It has been a challenge to improve the performance of epoxy insulation in the whole life cycle by achieving the reduction of residual stress during manufacturing, the healing of damages during application, and the recycling after decommissioning. In this paper, a novel recyclable epoxy resin (SEP) with releasable residual stress and synergistically enhanced dielectric properties and healing ability was successfully developed by introducing dynamic thiocarbamate bonds (DTBs). A reduction in residual stresses by 45 % was detected after SEP was annealed at 30 °C below the glassy transition temperature (Tg) for 8 h, during which the mechanical properties remained unchanged. Synergistically improved dielectric properties and damage-healing ability were also observed in SEP. A high healing efficiency of 94.4 % for electrical breakdown damage was found in SEP, meanwhile its dielectric properties were superior to commercial epoxy resin. Additionally, SEP featured good recyclability, including reprocessability and degradability. All those excellent properties were ascribed to the dissociation and recombination of DTBs triggered by thermal stimulation. This work provides an effective solution to a series of issues throughout the full lifecycle of epoxy materials.

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来源期刊
Polymer
Polymer 化学-高分子科学
CiteScore
7.90
自引率
8.70%
发文量
959
审稿时长
32 days
期刊介绍: Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.
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