The radiation cmsslinking and shape-memory behavior of the blends of poly(ε-caprolactone)(PCL) and polyfunctional polyester acrylme (PEA) were studied．The influences of the usage of PEA

the number of functional group and radiation dose on radiation crosslinking

dynamic mechanical properties and shape memory behaviors of PCL were investigated．It was concluded that radiation crosslinking of PCL／PEA blends didn’t follow the classic Charlesby-Pinner equation

but was in agreement with Chen-Liu-Tang relation．The efficiency of radiation crosslinking of PCL could be distinctively improved by using polyfunctional PEA．The more the usage and the functional group number．the more the gel content and the more distinctive the radiation erosslinking effects．This also indicated that the polyfunetional PEA directly participated in the erosslinking reaction．The DMA analysis indicated that enhanced radiation cross-linking raised the heat deformation temperature of PCL and presented a hisher and wider rubbery state plateau．whereas rendered more enotlsh strength at temperatures above the melting point of PCL and provided enough force to reeover mote strain than in the case of pure PCL．The shape memory results revealed that the well crosslinked PCL presented 100％ strain recovery with quick recovery rate．