Substituted oxetanes in polymer synthesis. III. Polyesters based on 3,3-bis(chloromethyl)oxetane and various dicarboxylates. The influence of the chemical structure upon thermal behaviour

This paper presents some aspects regarding the synthesis and thermal behaviour of polyesters, based on 3,3-bis(chloromethyl)oxetane (BCMO) and various dicarboxylates. In order to explain the different behaviour of the reaction systems, the reactivity of the dicarboxylate anions in the nucleophilic replacement of the chlorine atom was estimated using an AM1 programme. The polymers were characterized by H-1-NMR and DSC. Almost all the studied polyesters show good thermal stability. The iop-sides connection of the structural units to the main chain lowers the transition temperatures.