Study on the compatibility between domestic T800 grade carbon fiber sizing and resin matrix

doi:10.19936/j.cnki.2096-8000.20260828.018

Abstract

Abstract: Characterization methods such as a rheological analyzer, FTIR (fourier transform infrared spectroscopy), and DSC (differential scanning calorimetry) were used to analyze the viscosity-temperature characteristics and chemical compositions of domestic T800 grade carbon fiber sizing agents produced by wet-spinning and dry-jet wet spinning processes, as well as high temperature epoxy resins. The curing reaction kinetic characteristics of the sizing agents and the resin were investigated, and the reaction characteristics and compatibility between the sizing agents and the resin were studied. The research results showed that the sizing agents of the two spinning processes have a high degree of compatibility with the reaction performance of the BA9918E resin. The resin molecules and sizing agent molecules can penetrate each other. The activation energy of GW800G carbon fiber sizing agent is equivalent to that of BA9918E resin, and it is easier to chemically bond with the active groups on the carbon fiber surface and the epoxy resin. The addition of the sizing agent advances the exothermic reaction of the resin, and the functional groups change during the reaction process of the sizing agent/resin mixture system, indicating that a chemical reaction can occur between the resin and the sizing agent. This indicates the carbon fiber sizing agent and the epoxy resin have good chemical reactivity, which is conducive to the formation of a good interfacial compatibility between the carbon fiber and the resin.

Key words: domestic T800 grade carbon fiber, spinning process, sizing, compatibility, interfacial compatibility

CLC Number:

TB332

TIAN Tiebing, LU Jiahui, BAI Yu, PENG Gongqiu, LI Guoli, CAO Zhenghua. Study on the compatibility between domestic T800 grade carbon fiber sizing and resin matrix[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(8): 144-152.

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