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    題名: Measurement of elongational viscosity for polymer melts by fiber spinning
    作者: Lin, Gwo-geng;Hu, Ming-chong
    貢獻者: 淡江大學化學工程與材料工程學系
    日期: 1997-09
    上傳時間: 2013-05-30 15:24:53 (UTC+8)
    出版者: Hoboken: John Wiley & Sons, Inc.
    摘要: The elongation behavior of various polymer melts extruded from the single screw extruder has been studied. Low-density polyethylene, high-density polyethylene, polypropylene, and their short glass-fiber (GF)-filled composites were used. It was found that the spinning stability was good but the drawability was poor for GF-filled polymers. The elongation viscosity was measured by use of a Gottfert tensiometer (Rheotens) in the strain rate range from 0.1 to 4 s−1. In regard to the viscosity calculations, a very convenient and straightforward method, especially for molten materials without die swell, is presented. All the sample melts showed slight tension thinning; that is, the elongation viscosity decreased along with the strain rate. It was also found that the elongation viscosity of the GF-filled polymer may increase along with the fiber content up to a critical value, and then drop if more fiber is added. The influence of the die geometry on the viscosity measurement is discussed.
    關聯: Advances in Polymer Technology 16(3), pp.199-207
    DOI: 10.1002/(SICI)1098-2329(199723)16:3<199::AID-ADV4>3.0.CO;2-O
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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