Relaxation transitions in gels based on butadiene-styrene copolymers

The relaxation transitions in gels based on star-shaped block copolymers of butadiene and styrene were studied by the method of DSC. The effects of th e content and selectivity of a plasticizing agent on the relaxation transit ion temperatures and the concomitant changes in heat capacity DeltaC(p) wer e characterized. The two-phase structure of gels was proven. The segmental mobility of polymer chains in the vicinity of the interfacial polystyrene d omain-polybutadiene matrix boundary was found to be different from the mobi lity of segments within the volume of phases.