Аннотация:The kinetics of macroradical loss in irradiated interpolymers of poly(1,1,2-trichlorobutadiene) and polystyrene isolated at different stages of interpolymer reaction was studied. The results obtained were compared with the DSC data. It was concluded that the character of component segregation significantly depends on both the degree of completion of the interpolymer reaction and the procedure of sample preparation. Specific features of the formation of the interpolymer microstructure and its effect on molecular mobility were discussed.