INFLUENCE OF STRUCTURE OF BUTHYLMETHACRYLATE AND METHACRYLIC ACID COPOLYMER ON ITS THERMAL BEHAVIOUR

Abstract

Thermal behaviour of BMA and MAA copolymers with the similar composition of different structure  –  random and block  –   have been studied. By TG and DSC experiments it has been shown that the thermal stability of the block copolymer is less  than that of the random one. The activation parameters for every stage of thermal destruction of  PBMA, PMAA and their copolymers
have been calculated. It has been shown that the thermal degradation  of PBMA is the result of homolysis, while for PMAA and copolymers we suppose the mixed mechanism of that process. It has been shown that destruction of the block copolymer  begins on the sites of the block combination with the crosslinking agent.