Renewable Bis-benzoxazine Monomers from Lignin Derivatives: Synthesis, Characterization and Studies on Curing Behavior

By : Chunyan Liu, Yunhe Liu, Zihan Pan, Qiuting Li, Han Xu, Tao Liu

Page No: 87-99

Abstract
In this work, a series of novel lignin-based bis-benzoxazine monomers were efficiently synthesized by the reaction of renewable phenols: guaiacol, vanillyl alcohol, eugenol, vanillin with ethylene diamine and paraformaldehyde. The chemical structures of these lignin-based bis-benzoxazine monomers were confirmed by 1 H-NMR,13C-NMR and FTIR, indicating the formation of benzoxazine ring. The obtained bis-benzoxazine monomers were cured via thermal treatment. The curing behavior of these lignin-based bis-benzoxazine monomers were compared and analyzed via differential scanning calorimetry (DSC), showing that Va-e possessed higher ring-opening polymerization activity than G-e, while E-e and V-e had lower curing activity than G-e.

Authors
Chunyan Liu, Yunhe Liu, Zihan Pan, Qiuting Li, Han Xu and Tao Liu
Chengde Petroleum College, Department of Chemical Engineering, Chengde 067000, Hebei, China

DOI: https://doi.org/10.32381/JPM.2019.36.01.7