期刊Elastic property of polyolefin elastomer film cross linked by electron beam irradiation.pdfVIP

Fibers and Polymers 2012, Vol.13, No.9, 1165-1169 DOI 10.1007/s12221-012-1165-x Elastic Property of Polyolefin Elastomer Film Cross Linked by Electron Beam Irradiation 1,2 2 1* Je Sung Youm , Jeong Cheol Kim , and Kap Seung Yang 1 Department of Polymer and Fiber System Engineering, Chonnam National University, Gwangju 550-757, Korea 2Korea Institute of Industrial Technology, Gwangju 500-480, Korea (Received November 13, 2011; Revised March 11, 2012; Accepted May 6, 2012) Abstract: Polyolefin elastomers were extruded to form films and subjected to electron beam (EB) irradiation at various energy levels. The film samples were characterized to illuminate the effects of EB-induced cross-linking through measurements of gel contents, Fourier transform infra-red (FT-IR) spectroscopy, and variations of tensile properties of the films after the EB irradiations. The EB irradiations introduced crosslinking among the molecular chains resulting increases in initial modulus. The elastic recovery was 83 % at 30 % stain, which is increased by 10 % at 150 kGy compared with pristine. The maximum stain was 1,400 % at 150 kGy which is comparable with commercial polyurethane elastomer. Keywords: Electron beam irradiation, Electron beam curing, Crosslinking, Polyolefin elastomer Introduction to increase their elastic properties. Free radicals are introduced in polymers when they