| Popis: |
The NMR13C method used to establish the structure of polycondensates (polyesters) based on asymmetrical monomers (β-hydroxyethyl esters of bisphenols) and symmetrical (dicarboxylic acid dichlorides) monomers. It was found that under conditions of non-equilibrium polycondensation, according to the structure of initial compounds and the method of introduction into the reaction zone, polymers may be obtained with varying directions of adding the units: “head to head”, “tail to tail”, “head to tail” and “tail to head”. By changing these factors polymer structure may be adjusted in the requisite direction. |
