Influence of processing and material variables on resin‐fiber interface in liquid composite molding

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Abstract
In this study, systematic investigation of influence of processing variables on the tensile strength and resin‐fiber interface of composites prepared by liquid composite molding process was carried out. The variables studied included injection pressure and mold/fiber mat temperature. Fibers were better wetted and bonded at lower injection pressure and higher molding temperature, which resulted in a higher tensile strength of molded composites. Single filament composite tests were also used in conjunction with birefringence studies to characterize interface bonding. Improved interfacial behavior was observed in the case of compatible systems.

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