文献类型：期刊文献

英文题名：Curing Kinetics of Main-Chain Benzoxazine Polymers Synthesized in Continuous Flow

作者：Zhou, Zhou[1];Si, Qian[1];Wan, Li[1];Kuo, Shiao-Wei[2];Zhou, Changlu[1];Xin, Zhong[3]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Natl Sun Yat Sen Univ, Dept Mat & Optoelectron C Sci, Kaohsiung 804, Taiwan;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：61

期号：7

起止页码：2947

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20220911704715);WOS:【SCI-EXPANDED(收录号:WOS:000766191300026)】；

基金：The authors acknowledge the Shanghai Pujiang Program (2020PJD015), the National Natural Science Foundation of China (21978086), Shanghai Municipal Science and Technology Commission (21520761100), the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-21C07), and the Fundamental Research Funds for the Central Universities, Science and Technology Commission of Shanghai Municipality (20DZ2254500).

语种：英文

外文关键词：Activation energy - Differential scanning calorimetry - Curing - Size exclusion chromatography - Kinetics - Molecular weight - Ring opening polymerization - Reaction kinetics - Nuclear magnetic resonance spectroscopy

摘要：Main-chain benzoxazine polymers MCBP(BPA-ddm)s were synthesized in continuous flow under various residence times of 5, 10, and 15 min. MCBP(BPA-ddm)s with high molecular weight above 5000-10 000 g mol(-1) and high purity over 93% oxazine ring-closed ratio were obtained, which were characterized using Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance spectroscopy, and size exclusion chromatography. In situ FTIR spectroscopy and differential scanning calorimetry were performed to understand the curing reaction and kinetics of MCBP(BPA-ddm)s, suggesting a typical thermally driven self-catalyzed ring-opening polymerization profile with an apparent activation energy of 82-118 kJ mol(-1), which follows firstorder curing kinetics regardless of the molecular weight.