POLYMER BLENDS CONTAINING COPOLYMERS

Blends with random or block copolymers are discussed, where all components are made of one or both monomers of a given monomer pair. The critical copolymer compositions of blends of two random copolymers were determined, and phase morphologies were studied in blends close to and far from the critical point. Further, the tensile strength of blends of varying compatibility was tested. Microphase and macrophase structures of blends with one or two homopolymers and a symmetric block copolymer were characterized as a function of the chain length ratio of the components. Experiments were compared with model calculations.