Dynamic cure kinetics of epoxy resins using an amine-containing borate as a latent hardener

作者：Liu, Qiao Yan; Chen, Jin Bin; Liu, Shu Mei^*; Zhao, Jian Qing

来源：Polymer International, 2012, 61(6): 959-965.

DOI：10.1002/pi.4165

• epoxy resins
• latent hardeners
• cure kinetics
• differential scanning calorimetry

An amine-containing borate (labeled NBD) was obtained by a one-step esterification using neopentyl glycol, boric acid and N,N-dimethylethanolamine (DMEA) as reactants, and nuclear magnetic resonance as well as Fourier transform infrared (FTIR) measurements were used to characterize its chemical structure. The thermally latent curing properties of NBD were confirmed by differential scanning calorimetry (DSC), FTIR and gelation time results. The cure processes of bisphenol A diglycidyl ether epoxy resins (E51) using NBD as a latent hardener in comparison with a common hardener, DMEA, were studied by DSC measurements. The Avrami and Arrhenius methods as well as the Horowitz-Metzger method were used to calculate kinetic parameters. These methods also revealed a transition at which the cure reaction mechanism showed a marked change and provided the apparent activation energy Ea associated with the cure reaction at different reaction stages.

• 出版日期2012-6
• 单位华南理工大学