Abstract: HDPE-g-PB was synthesized by post-radiation polymerization of butadiene onto HDPEfilm. Compatibilization of the incompatible blends of poly(cis-1,4-butadiene)/HDPE wasbrought about by blending HDPE with the graft copolymer HDPE-g-PB. Compatibilizationwas verified by the facts tbat the glass transition temperature of PB in the blend shifted to7-9℃ higher and the transition temperature at 263 K shifted to 6-8 K lower; the tensilestrength and the elongation at break of PB/PE-g-PB was higher than that of PB/HDPEblend at the same ratio of PB/PE; SEM micrograph showed a more homogeneous phase dis-tribution and a smaller phase size in PB/PE-g-PB blend than in PB/HDPE blend.

Key words: HDPE-g-PB graft copolymer, compatibilization, blends, post-radiation graft copolymerization, compatilizing agent