CF/GF Hybrid Composite Materials using MDI as Third Component and Their Mechanical Properties

Abstract

In the previous work, isocyanate modification of epoxy acrylate resin (EPA) was studied to improve the mechanical properties of CF/GF hybrid composite materials. In this work, some chemical reactions of diphenyl methan diisocyanate (MDI) as the third component with surface treatment agents of CF and GF were studied to improve the mechanical properties of the laminates. Epoxy silane and amino silane coupling agents were applied to GF surface in order to improve the interlaminar adhesion bonding. As the results, interlaminar shear strength and flexural bending strength were markedly improved, which indicated that some covalent bonds such as ester, urethan and urea bonds partially linked fiber surfaces with resin matrix.