A bio-based reprocessable and degradable polybenzoxazine with acetal structures

被引：9
|
作者：
Chen, Jiahao [1 ]
Lu, Xin [1 ]
Xin, Zhong [1 ]
机构：
[1] East China Univ Sci & Technol, Sch Chem Engn, Dept Prod Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China
来源：
REACTIVE & FUNCTIONAL POLYMERS | 2023年 / 191卷
关键词：
Bio-based; Polybenzoxazine; Reprocessable; Degradable; Acetal; HIGH-PERFORMANCE; EPOXY THERMOSETS; BENZOXAZINE; VITRIMER; DIACETAL; VANILLIN; POLYMERS; CARDANOL; MONOMER;
D O I：
10.1016/j.reactfunctpolym.2023.105653
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In this work, a bio-based reprocessable and degradable polybenzoxazine with acetal structures was designed and prepared. A diphenol containing acetal structures (DVEA) was reacted with stearylamine and paraformaldehyde to obtain a benzoxazine monomer (DVEA-s). The curing behavior of DVEA-s was investigated using differential scanning calorimetry and in-situ Fourier transform infrared spectroscopy, and the curing kinetics of DVEA-s were also studied. Due to the thermal exchange of acetal structures, the obtained polybenzoxazine (PDVEA-s) exhibited quick stress relaxation. Mechanically crushed PDVEA-s could be reprocessed by hot-pressing at 120 degrees C for 10 min. Furthermore, the degradation properties of PDVEA-s under different conditions were studied. The results showed that PDVEA-s could be completely degraded in acidic tetrahydrofuran aqueous solution at 50 degrees C in 4 min.
引用
收藏
页数：8
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