Polyethylenes revisited: Waxs and the phase structure

Abstract The use of multiple Cauchy/Gauss envelopes to describe crystalline and amorphous reflections in the deconvolution of X-ray diffraction patterns is examined. Crystallinities were estimated for a number of ethylene polymers and copolymers with a variety of sample configurations and of band inputs. These are compared with crystallinities estimated from density and enthalpy of fusion data. The significance of the extra bands required to give an optimum fit with the diffraction pattern is discussed briefly.