Intramolecular mobility in solutions of polymers with phenylbenzoate groups

Abstract

Intramolecular mobility in solutions of a comb-like polymer-poly((4-methacryloyloxy) phenyl 4-(nonloxy) benzoate) has been studied by the dielectric relaxation method. Depending on the thermodynamic quality of the solvent, a different number of relaxation processes can be observed in solutions of this polymer, owing to the effect of solvent on the kinetic mobility of the side group. The existence of two relaxation processes in a good solvent indicates a more labile structure of the side group under these conditions with an independent motion of two polar groups. A single relaxation process is observed in a poor solvent owing to increased rigidity of the side group. The intramolecular structure formation is most strongly pronounced in a thermodynamically poor solvent and results in increased rigidity of both the side group and the main chain.