文献类型：期刊文献

英文题名：Effect of pyrogallol on the ring-opening polymerization and curing kinetics of a fully bio-based benzoxazine

作者：Li, Xiu[1];Yao, Hongjie[1];Lu, Xin[1];Chen, Chen[1];Cao, Yuzhu[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

年份：2020

卷号：694

外文期刊名：THERMOCHIMICA ACTA

收录：;EI(收录号：20204409434093);WOS:【SCI-EXPANDED(收录号:WOS:000596370400007)】；

基金：This work was financially supported by National Natural Science Foundation of China (21776080) and Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-02-E00061).

语种：英文

外文关键词：Benzoxazine; Ryrogallol; Ring-opening polymerization; Curing kinetics

摘要：In this work, the effect of pyrogallol which served as a phenolic nucleophile on the ring-opening polymerization and curing kinetics of the eugenol/stearylamine-based benzoxazine (E-s) was examined with phenol as a contrast. The differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) results revealed that pyrogallol demonstrated higher ability to promote the ring-opening polymerization of E-s compared to phenol. The exothermal peak temperature of E-s was reduced from 254 degrees C to 168 degrees C with the addition of pyrogallol. Moreover, the curing kinetics of the E-s and pyrogallol mixture (E-s/py) were studied with Kissinger, Ozawa, Flynn-Wall-Ozawa and Friedman methods. The results indicated that the apparent activation energies (E-a) of E-s decreased with the addition of pyrogallol. In addition, the polymerization process of E-s/py followed the autocatalytic kinetic model based on Friedman method.