The preparation and properties of infused epoxy resin with different curing agents

doi:10.19936/j.cnki.2096-8000.20260528.015

Abstract

Abstract: In response to the demand for medium-to-low temperature epoxy resins(EP)for carbon fiber reinforcedcomposites, the effects of different mixing ratios of 5-amino-1,3,3-trimethylcyclohexylamine(IPDA)/polyetheramine(8100) on the viscosity,thermal and mechanical properties of the resin system were systematically studied. The results show that with the increase of curing agent 8100, the glass transition temperature (T_g) of the resin system shows a tendency to decrease, and the bending strength and impact strength both shows a tendency to increase first and then decrease. When the mass ratio of IPDA and 8100 is 1∶1, the viscosity of resin system is 347 mPa·s, which meets the requirements of vacuum perfusion process. The T_g is 101.8 ℃, and the bending strength is 110 MPa, the impact strength is 16.5 kJ/m².The CF/EP composite prepared by vacuum perfusion molding process has tensile strength of 919 MPa, bending strength of 715 MPa, shear strength of short beam 49.4 MPa, which is equivalent to that of commercial epoxy resins. SEM analysis shows that the fracture surface of CF/EP system exhibits excellent interface performance between resin and fiber. Comprehensive analysis shows that when IPDA and 8100 mass ratio 1∶1, both epoxy resin and carbon fiber composites have good mechanical properties.

Key words: epoxy resin, mixed curing agent, vacuum infusion, thermal properties, mechanical properties

CLC Number:

TB332

HOU Yan, ZHANG Hongyuan, ZHANG Ruitao, FAN Chuangbi, ZHAO Yu, ZHANG Xinggang, ZENG Fei. The preparation and properties of infused epoxy resin with different curing agents[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(5): 116-120.

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