Influence of the prehistory on the structure and properties of segmented urethane-urea block copolymers

From an analysis of the results of X-ray study, thermomechanical investigations, IR spectroscopy and also the deformation-strength behaviour of segmented urethane-urea block copolymers, it has been established that because of kinetic restrictions the microheterogeneous structure of these polymers obtained from solution is non-equilibrium and is capable of perfectioning under the influence of additional treatment (heating, limited swelling in a number of low molecular weight liquids). The main upshot of this treatment is orientation ordering of the rigid blocks forming part of their microphase.