Hybrid Effect on Mechanical Properties of M40-T300 Carbon Fiber Reinforced Bisphenol A Dicyanate Ester Composites

摘要

Interply and intraply hybrid composites based on Bisphenol A Dicyanate ester (BADCy), high strength carbon fibers T300, and high modulus carbon fibers M40 were prepared by monofilament dip-winding and press molding technique. The tensile, flexural, inter-laminar shear properties and SEM analysis of the hybrid composites with different fiber content and fiber arrangement were investigated. The results indicated that the mechanical properties of intraply hybrid composites were mainly determined by fiber volume contents. When the ratio of fiber volume content was close to 1:1, the intraply hybrid composites possessed lowest tensile and flexural strength. The mechanical properties of interply hybrid composite mainly depended on the fiber arrangement, instead of the fiber volume contents. The hybrid composites using T300 fiber layout as outside layer possessed high flexural strength and low flexural modulus, which was close to that of T300/ BADCy composites. The hybrid composites ([(M40)_x/ (T300)_y]_s) using M40 fiber layout as outside layer and T300 fibers in the mid-plane had high flexural modulus and interlaminar shear strength.