Distinguishing amorphous polymer blends from copolymers by wide angle X‐ray diffraction

Abstract Amorphous homopolymer blends were differentiated from the corresponding random copolymers with wide angle X‐ray diffraction (WAXRD) using the diffraction angle and the band width at one‐half peak maximum. The diffraction angle was also used to determine the composition of copolymers and of mixtures of homopolymers. A procedure has been developed to predict the WAXRD patterns of polyblends and/or random copolymers based on those of the corresponding homopolymers.