Effect of Crystallization on Mechanical Properties of CFRTP

Abstract

Carbon fiber reinforced thermoplastics are consisted with the carbon fiber and thermos plastics such as PP, PA6, PI, and PC and so on. Mechanical properties, especially viscoelasticity, of CFRTP were depended on the matrix resin, therefore, if the mechanical properties of matrix resin has changed, CFRTP’s properties will be also changed. In this study, carbon fiber reinforced polyamide 6 was used for evaluate the effect of crystallization. The materials were heat treated for crystallization, and the crystallization was controlled by heat treatment time. As the result of dynamic mechanical analysis, storage modulus was decreased with the increase in the heat treatment time, however, longer heat treatment time made the storage modulus increased. As the results of DSC measurement, the peak shape of melting point was different each other. The double peak was observed with the longer heat treatment time, however, the single peak was observed with the short heat treatment time. This is because the mechanical properties of CFRTP was dominated by the peak shape and peak area of the melting point.