STRUCTURAL EFFECTS ON THE THERMAL-PROPERTIES OF PDPS PDMS COPOLYMERS

A series of PDPS/PDMS copolymers were synthesized through living anionic polymerization with n-butyllithium as an initiator. The changes of thermal property as a function of PDPS content were compared with respect to different types of monomer sequence using differential scanning calorimetry and thermogravimtery. The results indicated that the related variations of the thermal properties vs. the PDPS content and the monomer sequence provided independent operative control for preparing materials with desired thermal properties. The thermal stability of these copolymers was dramatically improved with introducing PDPS segment. However, the degree of these improvement depended greatly on the monomer sequence in the copolymers.