EXPERIMENTAL STUDY OF ONLINE MONITORING CURING PROCESS OF EPOXY RESIN UNDER MEDIUM TEMPERATURE CONDITION BY ULTRASONIC TECHNIQUE

Abstract

Abstract: Ultrasonic transmission technique is successfully employed to real-time online monitor curing process of epoxy resin under different conditions. The relationship between ultrasonic amplitude attenuation and curing time of epoxy resin as well as the effect of mould thickness and glass fiber on the curing reaction process of epoxy resin under medium temperature are investigated, respectively. Experimental results indicate that ultrasonic attenuation firstly increases then decreases and finally tends to be stable. As the curing reaction proceeds, the appeared time of gel point and the phase change process transformed from viscous-gel state to gel-glass state can be accurately measured by ultrasonic attenuation. It is shown that the curing time can be shorten by raising temperature, the appeared time of gel point can be delayed by adding thickness and glass fiber in some degree and their mechanisms are discussed. The ultrasonic online monitoring can provide a theoretical basis and important technical support for the molding and processing technology of epoxy resin composite materials.

Key words: ultrasonic, epoxy resin, curing reaction, glass fiber, attenuation

CLC Number:

TB332

HU Yan, HUANG Gui-fei, LIANG Ke, XIE Jia-yu. EXPERIMENTAL STUDY OF ONLINE MONITORING CURING PROCESS OF EPOXY RESIN UNDER MEDIUM TEMPERATURE CONDITION BY ULTRASONIC TECHNIQUE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(5): 11-15.

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