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Ultrahigh molecular weight polyethylene fibers prepared using conical dies with varying dimensions

Authors

  • Jen-Taut Yeh,

    Corresponding author
    1. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
    2. Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Wuhan University of Science and Engineering, Ministry of Education, Wuhan, China
    3. Ministry of Education, Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan, China
    4. Department of Polymer Materials, Kun Shan University, Yung Kang, Tainan
    5. School of Printing and Packaging, Wuhan University, Wuhan, China
    • Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
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  • Chuen-Kai Wang,

    1. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
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  • Qin Zhou,

    1. Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Wuhan University of Science and Engineering, Ministry of Education, Wuhan, China
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  • Huo-Peng Zhou,

    1. Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Wuhan University of Science and Engineering, Ministry of Education, Wuhan, China
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  • Chih-Chen Tsai,

    1. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
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  • Yu-Ching Lai,

    1. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
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  • Chi-Hui Tsou,

    1. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
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  • Kan-Nan Chen,

    1. Department of Chemistry, Tamkang University, New Taipei City, Taiwan
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  • Chi-Yuan Huang,

    1. Department of Materials Engineering, Tatung University, Taipei, Taiwan
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  • Kuei-Chi Lee

    1. Department of Textile Engineering, Chinese Culture University, Taipei, Taiwan
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Abstract

Dimensions of conical dies were found to have a significant influence on thermal, morphological, orientation, ultradrawing, and dynamic mechanical properties of the as-prepared and/or drawn ultrahigh molecular weight polyethylene (UHMWPE) fiber specimens prepared in this study. Many demarcated “micro-fibrils” were found paralleling to fiber direction of the as-prepared UHMWPE fiber specimens. The percentage crystallinity, melting temperatures, orientation factor (fo) and achievable draw ratio (Dra) values of each as-prepared UHMWPE fiber specimen prepared at a fixed length of outlet land reach a maximum value, as the entry angles of the conical die approach the optimum value at 75°. The maximum fo and Dra values obtained for each F2075-y as-prepared fiber series specimens prepared using the optimum entry angle reach another maximum value as their length of outlet land approach the optimum value of 6.5 mm. The ultimate tensile strengths and moduli of the drawn UHMWPE fibers prepared at the optimum entry angle and length of outlet land are significantly higher than those of fibers prepared at other conditions but stretched to the same draw ratio. Possible reasons accounting for the above interesting properties were discussed in this study. POLYM. ENG. SCI., 2013. © 2013 Society of Plastics Engineers

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