Microphase Separation in Solutions of Crystallizable Segmented Polyurethane

摘要

At present time the level of microphase separation together with polymer nture is considered to be a main factor in determining the physico-mechanical properties of polyurethane materials. The researches show that realization of a certain polymer structure and properties of polymer are defined by microstructure of polyurethane chain. The purpose of this work was to study physico-chemical regularities between nucleation and growth of microphase aggregations in Crystallizable segmented polyurethane compstions as a function of the phase state of the system during transferring from comon solvent to a selective solvent. Besides we investigated the architecture of macromolecules, associates and phase particles of segmented polyurethane (SPU) formed in different regions of the phase diagram.