FRACTURE BEHAVIOUR OF INJECTION MOULDED RUBBER TOUGHENED POLY (BUTYLENE TEREPHTHALATE) COMPOSITES

摘要

The fracture behaviour of poly butylene terephthalate (PBT), rubber toughened PBT (RTPBT) and their glass fibre composites have been investigated. The RTPBT systems are comprised of three different types of impact modifiers namely crosslinked acrylate (XLA), core-shell styrene-acrylonitrile (CSR) and ethylene acrylate functional (EAF) rubbers. The fracture mechanical characterisation of was evaluated by using notched compact tension (CT) specimens. The fracture toughness, K_C was observed to be strongly dependent on both internal (types of impact modifiers and glass fibre content) and external (temperature, strain rate and hygrothermal ageing) parameters.