STUDIES ON INTERFACIAL BONDING PROPERTY AND INFLUENCING FACTORS OF PBO FIBER AND EPOXY RESIN

Abstract

Abstract: In this study, physical and chemical properties and interfacial adhesion with epoxy of domestic and imported poly-p-phenylene benzobisoxazole (PBO) fibers were studied. Two kinds of epoxy systems were developed. Wettability between these resins and fibers was evaluated using static contact angle method, and interfacial shear strength (IFSS) between PBO fiber and resin was measured by single fiber pull-out test. Unidirectional PBO/epoxy composite laminate was fabricated using wet winding molding process. Then, interlaminar shear strength (ILSS) was tested, and the effects of resin matrix and process conditions on ILSS were analyzed. Experimental results show that physical properties of domestic and imported PBO fiber are similar, but imported PBO fiber has higher content of surface active groups and higher IFSS with epoxy resin. Moreover, adding coupling agent into resin can improve interfacial shear strength. The developed resin systems show good wettability and interfacial adhesion with PBO fiber. Their ILSS can reach 48 MPa, and fiber content and modulus of resin matrix are believed to affect ILSS.

Key words: PBO fiber, epoxy resin, interfacial bonding property, interlaminar shear strength, wet winding process

CLC Number:

TB332

WANG Qian, GU Yi-zhuo, LIU Ning, ZHANG Cheng-shuang. STUDIES ON INTERFACIAL BONDING PROPERTY AND INFLUENCING FACTORS OF PBO FIBER AND EPOXY RESIN[J]. Fiber Reinforced Plastics/Composites, 2018, 0(12): 28-35.

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