Abstract

Aspects of the formation of a porous structure on strain of films of PVC and mixtures of it with the graft copolymer methylmethacrylate-butadiene-styrene in a medium of ethyl alcohol have been studied. The investigations were made with stretching at constant speed and on exposure to a constant load. The parameters of the porous structure depend on the level of the applied load indicating the applicability of the theory of the unstable meniscus for describing the systems studied. Widening of the crazes occurs by the mechanism of surface stretching. The porous structure appearing in the course of stretching is prone to typical colloidal processes such as coagulation of the fibrillized material. The role of the second component of the two phase system during crazing is discussed.

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