文献类型：期刊文献

英文题名：Two novel eugenol-based difunctional benzoxazines: Synthesis and properties

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

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

年份：2021

卷号：616

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20210909983188);WOS:【SCI-EXPANDED(收录号:WOS:000635434000008)】；

基金：We are grateful for the financial support from the Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-02-E00061), the National Natural Science Foundation of China (No. 21776091, 21776080), the Fundamental Research Funds for the Central Universities (No. 50321011917025, 50321011918010) and the Program of Leading Talents (2013).

语种：英文

外文关键词：Difunctional eugenol-based benzoxazines; Solvent-less synthesis; Low surface free energy

摘要：Two novel eugenol-based difunctional benzoxazine monomers, named E-pea and E-dda, were successfully synthesized with a solvent-less method from eugenol, paraformaldehyde, 4,7,10-trioxa-1,13-tridecanediamine and 1,12-dodecanediamine. Their molecular structures were verified with Fourier Transform Infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. Their curing behaviors were studied using differential scanning colorimetry (DSC) and FTIR techniques and a possible polymerization mechanism was proposed. Thermogravimetric analysis (TGA) was adopted to study the thermal stability of two polybenzoxazines, revealing that the fully polymerized E-pea and E-dda (denoted as PE-pea and PE-da) were both fairly thermostable with a char yield of 46.0 wt% at 800 ?. Finally, contact angle tests manifest that the surface free energy (SFE) of PE-dda film was as low as 16.88 mJ/m2 while that of PE-pea film was 28.56 mJ/m2. Such an obvious increase in PE-pea?s SFE value is mainly caused by the inherent hydrophilicity of ether bonds.