Abstract: A series of novel shape memory blend materials were fabricated by blending three kinds of styrene butadiene copolymer (SBS) with low density polyethylene (LDPE) and were chemically crosslinked by dicumyl peroxide (DCP). The degree of crosslinking, and the tensile strength and the elongation at break of the crosslinked blends were tested, at last, the shape memory effect of the blends were investigated. The results show that when the content of DCP were increased, the blend of the degree of crosslinking increased, wherein the degree of crosslinking of the SBS1201/LDPE blend was maximum. And with the increase in the degree of crosslinking, the tensile strength and break elongation were decreased. Moreover, when the DCP content was 0.5 to 1.5%, the crosslinked blend has the good shape memory behavior.

Key words: low density polyethylene, styrene butadiene copolymer, shape memory effect, Chemical crosslinking, Mechanical properties