Research on Fatigue Fracture Characterization of PC/ABS Blend

摘要

PC/ABS blend is widely used in the vehicle interior, electronic parts and accessories. In this dissertation, fracture crack properties of PC/ABS blend was studied. The specimens were prepared under various injections molding conditions, such as filling time, melting temperature and mold temperature. The fracture mechanisms were examined with a scanning electron microscopy. The injection molding condition of filling time 2 seconds, melting temperature 260°C and mold temperature 55°C had the slowest fracture crack propagation speed. The da/dN with ΔK curves were linear regression to find out Paris's equation coefficients. The fracture mechanisms were the crack surface edge fiber pulled off, pushing back and ribbed surface rendering stripes.