PP, PA6, PPS をマトリックスとした炭素繊維一方向材の特性に与える冷却速度の影響

抄録

The mechanical properties of three thermoplastic prepreg systems: carbon fiber/polypropylene (CF/PP), polyamide 6 (CF/PA6), and polyphenylene sulfide (CF/PPS) are studied and analytical formulas introduced for the extraction of matrix and interface properties from composites. Since a semi-crystalline thermoplastic matrix is sensitive to crystallization, the influence of cooling rate on strength is statistically evaluated. While the 0º tensile strength is independent of the cooling rate, the 90 tensile strength is strongly influenced by the matrix type and cooling rate. The matrix modulus increases as the cooling rate becomes lower; the degree of crystallinity also increases. The matrix residual stress, interfacial shear strength, and mode II interlaminar fracture toughness are also dependent on the cooling rate, with the trends different for different matrices.