Study on specific heat capacity and thermal conductivity of glass fiber/epoxy resin prepreg during the whole curing process

doi:10.19936/j.cnki.2096-8000.20240428.003

Abstract

Abstract: The specific heat capacity and thermal conductivity of glass fiber/epoxy resin prepreg in different directions during the curing process were measured by modulated temperature differential scanning calorimetry (MDSC), and a model was established to describe the changes of specific heat capacity and thermal conductivity with temperature and curing degree. The specific heat capacity and thermal conductivity of the prepreg increase linearly with the increase of temperature when it is not cured and fully cured. During the curing process, it is subject to the dual effects of temperature and curing degree. In the early stage of curing reaction, there is a sudden change in the specific heat capacity and thermal conductivity, which first increases and then decreases under the effect of temperature and curing degree. In addition, the relationship between specific heat capacity and thermal conductivity with temperature and curing degree is described by mixing law and piecewise linear relationship, which is helpful to improve the accuracy of parameters in numerical simulation.

Key words: composites, prepreg, curing process, specific heat capacity, thermal conductivity, MDSC

CLC Number:

TB332

MA Shiheng, GE Jingran, LIU Kai, LI Yongshan, LIANG Jun. Study on specific heat capacity and thermal conductivity of glass fiber/epoxy resin prepreg during the whole curing process[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(4): 20-25.

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