SCANNING-X-RAY SCATTERING OF MOLDINGS FROM SEMICRYSTALLINE POLYMERS

The layered structure of plastic parts injection-moulded from industri al polypropylenes under varying processing conditions was studied by s canning small-angle and wide-angle X-ray scattering measurements on cr oss-sections of the parts. The analysis of the data in terms of appare nt crystallite sizes, several parameters characterizing the distributi on and orientation of different types of crystallites, and long period s is demonstrated by means of selected representative examples.