Curing Characteristics of an Epoxy resin in the Presence of Functional Graphite Oxide with Amine-rich Surface
writer：Le Li, Zhong Zeng, Huawei Zou*, Mei Liang*
keywords：Epoxy resin, Cure kinetics, Functional graphite oxide, Amine-rich surface, Curing reaction pathways
source：期刊
specific source：Thermochimica Acta, 2015, 614: 76-84.
Issue time：2015年
ABSTRACT: Functional graphite oxide (DGO) with amine-rich surface was successfully prepared through the amidation reaction and characterized by X-ray diffraction analyses (XRD), Fourier transform infrared spectra (FTIR) and Raman spectra. The effects of functional graphite oxide on the curing kinetics of epoxy (EP) were investigated by means of differential scanning calorimetry (DSC). The curing kinetic parameters of EP, EP/graphite oxide (GO) and EP/functional graphite oxide were obtained. There was not much difference in total heat of reaction DH and peak temperature Tp with the incorporation of GO or DGO. However, the activation energy, Ea, and the overall order of reaction m + n were enhanced. Comprehensive kinetic analyses indicated that the incorporation of GO sheets brought in an effect of inhibition on curing process. While the inhibition effect weaken when the GO is modified with aminerich surface. The possible curing mechanism and reaction pathways were proposed to provide a reasonable explanation.