Viscosity analysis and quantitative testing method of phenolic resin prepreg by hot melt method

doi:10.19936/j.cnki.2096-8000.20260628.006

Abstract

Abstract: The tackiness of prepreg is one of the key indicators in prepreg storage and composite material forming processes. Currently, there is a lack of standardized testing methods for the quantitative characterization of prepreg tackiness. In this study, a rheometer was employed as a tack-testing device to systematically investigate the effects of key process parameters such as temperature, compaction force, debonding rate, and aging on the tackiness of phenolic prepregs. The results demonstrate that the tackiness of phenolic prepregs is a function of temperature and compaction force, forming a maximum tack plateau under the synergistic mechanism of interfacial wetting and cohesion. Aging shifts the tack plateau toward higher temperature regions. Furthermore, through Arrhenius model fitting, the high-temperature tack behavior and resin-dominated debonding phenomenon of the prepreg were analyzed. The findings provide important insights for optimizing process parameters and performance in phenolic prepreg molding.

Key words: phenolic resin, prepreg tackiness, layup process, rheology, carbon fiber

CLC Number:

TB332

WANG Runji, ZHANG Zhongzhou, YIN Qichen, LI Yifei, YAO Yuejuan, CHEN Fei, LIUYuhong. Viscosity analysis and quantitative testing method of phenolic resin prepreg by hot melt method[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(6): 46-54.

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