FURTHER-STUDIES OF POLYCARBONATE POLY(BUTYLENE TEREPHTHALATE) BLENDS

The mechanical properties (tensile strength, low temperature falling weight impact strength) of XENOY CL-100 (a blend of polycarbonate and polybutylene terephthalate) have been studied. This blend is comprised of tough components and the property combinations that result may be useful for certain applications. The hydrolysis resistance of the blend in deionized water at 40 degree C has been studied. After 30 weeks it did not lose its tensile strength, but subsequently it did lose 50% of the low temperature ( minus 70 degree C) falling weight impact strength. If the minus 70 degree C low temperature toughness is an important quality, this should be taken into account. However, the low temperature ( minus 70 degree C) falling weight impact strength of pure polycarbonate and of pure poly(butylene terephthalate) is very low, while XENOY CL-100 is still tough material, even after 30 weeks immersion at 40 degree C.