| Popis: |
The influence of the method of synthesis on the structure and properties of cation-active polyurethane semicarbazides has been studied. It was shown that in polyurethane ionomers, prepared by a single stage method, the character and nature of structural heterogeneity is different from that of segment polyurethanes. In polyurethane ionomers, prepared by 2- and 3-stage methods, the structural heterogeneity is the result of segregation of rigid blocks owing to the dipole-dipole and ion-dipole interactions. |
