二胺
热稳定性
缩聚物
二甲苯
胺气处理
化学
高分子化学
催化作用
化学工程
制作
放松(心理学)
材料科学
聚合物
有机化学
病理
心理学
工程类
社会心理学
替代医学
医学
作者
Hua Zheng,Qi Liu,Xingfeng Lei,Yanhui Chen,Baoliang Zhang,Qiuyu Zhang
摘要
ABSTRACT Although polyimine vitrimers are a promising and invaluable class of self‐healing materials owing to their great maneuverability and fast exchange of crosslinks without catalysts, it remains a challenge to improve the mechanical properties and thermal stability of the material by simply designing their internal structures. Herein, we report a conjugation polyimine vitrimer, which was prepared by polycondensation of terephthaldehyde, m‐xylylene diamine and tris (2‐aminoethyl) amine as crosslinker. The incorporation of m‐xylylene diamine endows the materials with an expanded conjugation structure, which greatly improves its mechanical properties and thermal stabilities. On the other hand, m‐xylylene diamine is less toxic and irritant than the linear aliphatic ones usually used, which makes the reactions more environment‐friendly. Results show that these materials have excellent mechanical properties and thermal stability, perform good flexibilities after immersed in water and show very short relaxation times at elevated temperatures. In addition, especially, they exhibit good self‐healing efficiency under the condition of heat, water and amine solvents without the need for any catalyst. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56, 2531–2538
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