STUDY ON THE CURE KINETICS OF T800/EPOXY RESIN PREPREG BASED ON ACTIVATION ENERGY VARIABLE MODEL

Abstract

Abstract: To further analyze the curing behavior of a new kind of high temperature curing T800/epoxy resin prepreg, dynamic differential scanning calorimetry (DSC) method was carried out to investigate the cure behavior of T800/prepreg. The characteristic temperatures and cure kinetics parameters of the prepreg were systematically investigated based on phenomenological model, and the cure reaction kinetic model of the epoxy resin was determined to be the autocatalytic model. The relation of activation energy versus degree of cure was obtained by iso-conversional method for the epoxy resin in prepreg. The results show that the reaction activation energy of epoxy resin in the prepreg changed significantly with increasing degree of cure during the whole curing process. Thus, the curing model based on the assumption that the activation energy was a constant during the whole curing process could not describe this curing reaction accurately. Therefore, an activation energy variable autocatalytic kinetic model and particle swarm global optimization algorithm were used to obtain the cure kinetic equation of T800/epoxy resin prepreg. The results show that this model achieves a good correlation with the experiment data, hence providing a theoretical base for further study on thermodynamic properties and enables the quality control during the curing process for the prepreg.

Key words: dynamic DSC, activation energy variable model, cure kinetic equation, T800/epoxy resin prepreg

CLC Number:

TB332

YIN Rui, ZHAN Li-hua, LI Shu-jian. STUDY ON THE CURE KINETICS OF T800/EPOXY RESIN PREPREG BASED ON ACTIVATION ENERGY VARIABLE MODEL[J]. Fiber Reinforced Plastics/Composites, 2017, 0(4): 11-16.

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