Chunai Dai, Yang Shi, Zhen Li, Tingting Hu, Xiao Wang, Yi Ding, Luting Yan, Yaohua Liang, Yingze Cao, Pengfei Wang
A series of epoxy vitrimers (EVs) with enhanced glass transition temperatures ( T g s) were synthesized by curing epoxy resin E51 with different ratios of phthalic anhydride and sebacic acid as curing agents, and 1,5,7-triazabicyclic [4.4.0] dece-5-ene as a transesterification catalyst, and their curing dynamics, rheological properties, mechanical properties, and thermal stability were comprehensively investigated. By adjusting the molar ratio of the anhydride to the carboxylic acid in the curing agent, the T g s of the EVs increased from 79 to 143 °C with the increase in the anhydride content...
November 7, 2023: Polymers