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Influence of chemical crosslinking on the creep behavior of ultra-high molecular weight polyethylene fibers
Authors:J. P. Penning  H. E. Pras  A. J. Pennings
Affiliation:(1) Department of Polymer Chemistry, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands;(2) Present address: Pulp and Paper Research Center, McGill University, 3420 University street, H3A2A7 Montreal, Quebec, Canada
Abstract:In this study, the effect of chemical crosslinking on the creep behavior of high-strength fibers, obtained by gel-spinning and subsequent hot-drawing of ultra-high molecular weight polyethylene (UHMWPE), is examined. In the first part of the paper, the general aspects of the creep behavior of these fibers are discussed. The second part deals with UHMWPE fibers that are crosslinked by means of a) chlorosulfonation and b) dicumyl peroxide treatment followed by UV irradiation. The latter technique leads to an improvement of the creep resistance of the UHMWPE fibers without affecting their high tensile strengths. In spite of the fact that the network formation is fairly high, the creep cannot be completely removed. The results indicate that the creep process in UHMWPE fibers is associated with a deformation mechanism in the crystalline regions of the fiber, which are not affected by chemical crosslinking.
Keywords:Creep  UHMWPE fibers  solution-spinning  crosslinking  chlorosulfonation  dicumylperoxide  UV-irradiation
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