Evaluation of the Tensile Strength of Electron Beam Irradiated Powdered Ultra High Molecular Weight-Polyethylene (UHMWPE) Prior to Sintering

Abstract : We have studied the variation in tensile strength (sigma(b)), fracture strain (epsilon(f)) and Young modulus (d sigma/d epsilon) of low voltage electron beam irradiation (HLEBI) on powdered ultra-high molecular weight-polyethylene from 0.043 to 0.43 MGy prior to sintering. The low dose of 0.043 MGy-HLEBI enhanced the ob, epsilon(f) and d sigma/d epsilon, as well as increased the crystallinity ratio from 37 to 46% evaluated by differential scanning calorimetry (DSC). An additional dose apparently decreased the ab and ef, as well as the melting point from approximately 412 to 406 K and the crystallinity ratio from 46 to 43% for 0.043 to 0.43 MGy, respectively. Irradiation induces two competitive mechanisms, namely (i) the scission of chains and (ii) the crosslinking of chains. The discussion is focused on these mechanisms.
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Masae Kanda, Tiana Deplancke, O. Lame, Yoshitake Nishi, Jean-Yves Cavaille. Evaluation of the Tensile Strength of Electron Beam Irradiated Powdered Ultra High Molecular Weight-Polyethylene (UHMWPE) Prior to Sintering. Materials Transactions, Nihon Kinzoku Gakkai, 2015, 56 (9, SI), pp.1505-1508. 〈10.2320/matertrans.M2015108〉. 〈hal-01814300〉

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