CHUNYAN LIU*, YUNHE LIU, ZIHAN PAN, QIUTING LI, HAN XU, TAO LIU
Journal of Polymer Materials, Vol.36, No.1, pp. 87-99, 2019, DOI:10.32381/JPM.2019.36.01.7
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 1H-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. More >
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