Hygrothermal resistance of modified methyl diphenylacetylene silane composites

doi:10.19936/j.cnki.2096-8000.20230528.003

Abstract

Abstract: GF/MDPES-GBMI composites were prepared using modified bismaleimide (GBMI) blended with methyl diphenylacetylene silane (MDPES) resin. The effects of water absorption, dehydration behavior and hygrothermal aging on the interface of GF/MDPES-GBMI composites were studied through water absorption/loss experiments and theoretical calculation. The results show that with the increase of GBMI content in MDPES-GBMI resin, the diffusion coefficient of the composite decreases from 0.019 3 mm²/s to 0.014 7 mm²/s, and the permeability coefficient decreases greatly from 9.94×10^-4 mm²/s to 1.84×10^-4 mm²/s. At the same time, the equilibrium water absorption rate and the equilibrium water loss rate also decreases. Although the flexural strength of the composite decreases after hygrothermal aging, this property recovers after dehydration. Water molecules exist in a quasi-free form in the pores of GF/MDPES-GBMI composites, and the law of water absorption and dehydration follows Fick’s second law.

Key words: bismaleimide, silicylene hybrid resin, composite materials, hygrothermal aging, Fick’s law

CLC Number:

TB332

BAI Xiaotao, JIA Yuxiang, HU Wenjie, ZHANG Xiaohui, JIANG Fengguang, LIU Min, ZHOU Quan*. Hygrothermal resistance of modified methyl diphenylacetylene silane composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(5): 19-24.

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