A Self-Healable High Glass Transition Temperature Bioepoxy Material Based on Vitrimer Chemistry,Macromolecules

当前位置： X-MOL 学术 › Macromolecules › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A Self-Healable High Glass Transition Temperature Bioepoxy Material Based on Vitrimer Chemistry
Macromolecules ( IF 5.1 ) Pub Date : 2018-07-18 00:00:00 , DOI: 10.1021/acs.macromol.8b01010
Tuan Liu ₁ , Cheng Hao ₁ , Shuai Zhang ₁ , Xiaoning Yang ₂ , Liwei Wang ₁ , Jiarui Han _{1,

3} , Yuzhan Li ₁ , Junna Xin ₁ , Jinwen Zhang ₁

Affiliation

The design of high glass transition temperature (T_g) thermoset materials with considerable reparability is a challenge. In this study, a novel biobased triepoxy (TEP) is synthesized and cured with an anhydride monomer in the presence of zinc catalyst. The cured TEP exhibits a high T_g (187 °C) and comparable strength and modulus to the cured bisphenol A epoxy. By adopting the vitrimer chemistry, the cross-linked polymer materials are imparted significant stress relaxation and reparability via dynamic transesterification. It is noted that the reparability is closely related to the repairing temperature, external force, catalyst content, and the magnitude of rubbery modulus of the sample. The width of the crack from the cured TEP can be efficiently repaired within 10 min. This work introduces the first high-T_g biobased epoxy material with excellent reparability and provides a valuable method for the design of high-T_g self-healing materials suitable for high service temperature.

中文翻译：

基于Vitrimer化学的自修复高玻璃化转变温度生物环氧材料

具有高可修复性的高玻璃化转变温度（T _g）热固性材料的设计是一个挑战。在这项研究中，合成了一种新型的生物基三环氧基（TEP），并在锌催化剂的存在下用酸酐单体对其进行了固化。固化的TEP表现出高T _g（187°C）和与固化双酚A环氧树脂相当的强度和模量。通过采用三聚体化学，通过动态酯交换作用，使交联的聚合物材料具有显着的应力松弛和可修复性。注意，可修复性与修复温度，外力，催化剂含量和样品的橡胶模量密切相关。固化的TEP产生的裂缝宽度可以在10分钟内有效修复。这项工作介绍了第一种具有高可修复性的高T _g生物基环氧材料，并为设计适用于高使用温度的高T _g自修复材料提供了有价值的方法。

更新日期：2018-07-18

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南