文献类型：期刊文献

英文题名：Biobased Polybenzoxazine Vitrimer with Imine Bonds: Shape Memory, Reprocessing, and Degradation

作者：Qu, Yefan[1];Lu, Xin[1];Xin, Zhong[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：12

期号：20

起止页码：7739

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20242016089170);WOS:【SCI-EXPANDED(收录号:WOS:001224821800001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22378123).

语种：英文

外文关键词：biobased; polybenzoxazine; vitrimer; degradation; reprocessing; shape memory

摘要：A biobased reprocessable and degradable polybenzoxazine vitrimer was prepared by introducing dynamic imine bonds. An aldehyde-containing benzoxazine monomer (VSA) was synthesized through the Mannich reaction of vanillin, stearylamine, and paraformaldehyde, and then VSA was reacted with 1,12-dodecanediamine to prepare an imine-containing benzoxazine monomer (VSA-dda). The curing behaviors of VSA-dda were characterized by in situ Fourier-transform infrared spectroscopy and differential scanning calorimetry. The dynamic exchange reaction of imine bonds within the cross-linked network of polybenzoxazine (PVSA-dda) was studied by stress relaxation experiments. Due to the presence of imine bonds, PVSA-dda could be reprocessed by hot-pressing at 140 degrees C under 2 MPa. PVSA-dda exhibited a shape memory property and could recover its original shape by heating at 100 degrees C. The degradation performance of PVSA-dda was investigated under various conditions, and the results showed that PVSA-dda could be degraded within 29 min in an acidic solution of tetrahydrofuran and water at 50 degrees C.