One-Pot Synthesis of High Performance Bismaleimide Vitrimers Based on Dynamic Carbon–Sulfur Bonds

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-05-17 DOI:10.1021/acsmaterialslett.5c0048810.1021/acsmaterialslett.5c00488

Lisheng Wu, Lin Zhou, Yan Kou, Yin-Ning Zhou, Ying Guan and Mao Chen*,

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Abstract

Thermoset recycling has attracted great interest for circular material economy and environmental sustainability, but most recyclable thermosets enabled by classical dynamic bonds still suffer from complex synthesis of special monomers or inferior mechanical/thermal properties. Herein, relying on novel dynamic carbon–sulfur (C–S) bonds and available bismaleimide (BMI) resins, a high performance BMI vitrimer is reported. From one-pot synthesis, this BMI vitrimer exhibits exceptional thermal and physical properties with a typical T_g of ∼ 131 °C, storage modulus of 3.1 GPa, tensile strength of 80.4 MPa, and elongation of 12.2%, along with outstanding solvent resistance. Moreover, because of the exchangeable C–S bonds that are confirmed by model reactions, the BMI vitrimer possesses thermally-triggered malleability that is identified from stress–relaxation, creep deformation, and multireshaping investigations. Meanwhile, the BMI vitrimer can be selectively degraded by thiol compounds and achieve closed-loop recycling. This study will provide a convenient platform for the development of sustainable thermosets with high performance.

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基于动态碳硫键的一锅法合成高性能双马来酰亚胺Vitrimers

热固性固化剂的回收利用在循环材料经济和环境可持续性方面引起了人们的极大兴趣，但大多数由经典动态键实现的可回收热固性固化剂仍然存在复杂的特殊单体合成或较差的机械/热性能。本文报道了一种基于新型动态碳硫键（C-S）和双马来酰亚胺（BMI）树脂的高性能BMI聚合物。通过一锅合成，该BMI玻璃体具有优异的热物理性能，典型的Tg为~ 131°C，存储模量为3.1 GPa，抗拉强度为80.4 MPa，伸长率为12.2%，以及出色的耐溶剂性。此外，由于模型反应证实了可交换的C-S键，BMI聚合物具有热触发的延展性，这是通过应力松弛、蠕变变形和多重重塑研究确定的。同时，该物质可被巯基化合物选择性降解，实现闭环循环。本研究将为高性能可持续热固性材料的开发提供一个便利的平台。

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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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.