In order to compare the impact characteristics of polycarbonate (PC) and polycarbonate with acrylic films for degeneration resistance on the surfaces (PC(F)), the instrumented Charpy impact tests were carried out. The results obtained are as follows:
(1) The specific absorbed energies of PC and PC(F) specimens changed little at a small notch radius in the temperature range of -110-45°C but the specimens showed the ductile-brittle transition at a larger notch radius, and the transition temperature of PC(F) specimens shifted higher than that of PC specimens.
(2) The ratio of the specific absorbed energies of PC(F) nd PC decreased remarkably with an increase in notch tip radius when the notch tip radius became over 0.02mm in the temperature range of -110-0°C.
(3) It was found from microfractographs that the crack initiated at the middle of thickness in PC(F) test specimen at a small notch tip radius, but it initiated near the interface between PC resin and film in the specimen at a large notch tip radius.
