STRUCTURE OF POLYPROPYLENE POLYCARBONATE BLENDS CRYSTALLIZED UNDER PRESSURE

An analysis has been carried out of the crystalline structure of a ble nd consisting of amorphous polycarbonate and semicrystalline isotactic polypropylene (PP) crystallized under pressure. Structure investigati ons were carried out by means of wide-angle X-ray scattering. The amou nt of particular phases as well as the degree of crystallinity have be en analysed. It was found that during pressure crystallization, as wel l as the monoclinic alpha-modification, the triclinic gamma-form of PP also occurs, which disappears after recrystallization in non-pressure conditions. The crystallinity of PP in the blends is independent of t he composition of the polymeric mixture.