MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Evaluation of the Tensile Strength of Electron Beam Irradiated Powdered Ultra High Molecular Weight-Polyethylene (UHMWPE) Prior to Sintering
Masae KandaTiana DeplanckeOlivier LameYoshitake NishiJean-Yves Cavaille
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2015 Volume 56 Issue 9 Pages 1505-1508

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Abstract

We have studied the variation in tensile strength (σb), fracture strain (εf) and Young modulus (dσ/dε) 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 σb, εf and dσ/dε, as well as increased the crystallinity ratio from 37 to 46% evaluated by differential scanning calorimetry (DSC). An additional dose apparently decreased the σb and εf, 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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© 2015 The Japan Institute of Metals and Materials
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