Time-temperature-transformation (TTT) diagram of a domestic T800 carbon fiber epoxy prepreg

doi:10.19936/j.cnki.2096-8000.20230528.004

Abstract

Abstract: The curing kinetics and the time-temperature-transformation (TTT) diagram of prepreg system play an important role in designing and optimizing the curing cycle in order to obtain the ultimate properties of related products. In the present study, the curing kinetics of the domestic prepreg system with T800 carbon fiber and highly toughened epoxy resin were characterized by differential scanning calorimetry (DSC), and fitted using the autocatalytic model; in the aspect of phase transition behavior, the relationship between glass transition temperature and degree of cure was tested and fitted, and the relationship between gelation time and temperature was also obtained. Based on the obtained results, TTT diagram of the prepreg system was developed, providing the theoretical guidance for determining the curing cycle for composite parts.

Key words: composite materials, TTT diagram, curing kinetics, glass transition, epoxy resin

CLC Number:

TB332

HE Liang, XU Xiaowei, HU Dabao, LEI Yang, LI Yao. Time-temperature-transformation (TTT) diagram of a domestic T800 carbon fiber epoxy prepreg[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(5): 25-31.

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