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Polymers 2017, 9(3), 96; doi:10.3390/polym9030096

Crystal Structure Evolution of UHMWPE/HDPE Blend Fibers Prepared by Melt Spinning

Institute of Plastic Machinery and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Author to whom correspondence should be addressed.
Academic Editor: Shiao-Wei Kuo
Received: 9 January 2017 / Revised: 6 March 2017 / Accepted: 7 March 2017 / Published: 9 March 2017
(This article belongs to the Special Issue Polymer Blends 2017)
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Abstract

Ultra-high molecular weight polyethylene (UHMWPE) and high-density polyethylene (HDPE) blend fibers with the highest tensile strength of 1.13 GPa were prepared by a melt spinning process. The mechanical behavior and crystal structure of the as-spun filaments and fibers were studied by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray diffraction (XRD), sound velocity orientation testing, and tensile testing. The orientation degree, crystallinity, tensile strength, and initial modulus of the fibers increased with the increasing of the draw ratios. The grain size was shortened in the radial direction and elongated in the axial direction. The results suggested that the improvement of the tensile strength and initial modulus was a result of the compact crystal structure formed by slender grains composed of highly oriented molecular chains. Blending with HDPE could improve the formation of a slender and compact crystal structure, and the tensile strength and initial modulus of the blend fibers were higher. View Full-Text
Keywords: UHMWPE; HDPE; fibers; blend; melt spinning UHMWPE; HDPE; fibers; blend; melt spinning
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Wang, F.; Liu, L.; Xue, P.; Jia, M. Crystal Structure Evolution of UHMWPE/HDPE Blend Fibers Prepared by Melt Spinning. Polymers 2017, 9, 96.

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