Abstract

Wide-angle X-ray diffraction, electron microscopy and thermomechanical investigations have been used to study the physico-chemical properties of methylphenylsiloxane copolymers consisting of diorganosiloxane chain units and polycyclic fragments with a ladder-like structure. The properties of these copolymers have been found to depend on the ration of linear to cyclic fragments, and on the chemical composition of the latter. A micro-heterophase structure will form at some lengths of the fragments; the structure of each phase is due to the specific properties of the linear and ladder-like fragments.

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