Microphase separation in solutions of crystallizable segmented polyurethane

At present time the level of microphase separation together with polymer nt ure is considered to be a main factor in determining the physicomechanical properties of polyurethane materials. The researches show that realization of a certain polymer structure and properties of polymer are defined by mic rostructure of polyurethane chain. The purpose of this work was to study physico-chemical regularities between nucleation and growth of microphase aggregations in crystallizable segment ed polyurethane compstions as a function of the phase state of the system d uring transferring from comon solvent to a selective solvent. Besides we in vestigated the architecture of macromolecules, associates and phase particl es of segmented polyurethane (SPU) formed in different regions of the phase diagram.