This study presents contact angle measurements versus test liquids and directly between carbon fibers and a polyamide melt in combination with zeta-potential measurements to predict the adhesion in carbon fiber reinforced polyamide composites.In addition and to compare the results of the physico-chemical measurements model,composites were prepared to determine the interfacial shear strength as a measure for the adhesion between acidic or basic modified carbon fibers and a polyamide matrix.
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