Melt spinning and characterization of hollow fibers from poly(4-methyl-1-pentene) |
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Authors: | Martin Pelzer Thomas Vad Amrei Becker Thomas Gries Svetlana Markova Vladimir Teplyakov |
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Affiliation: | 1. Institut für Textiltechnik, RWTH Aachen University, Aachen, Germany;2. A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia |
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Abstract: | In this article, the melt spinning behavior of poly(4-methyl-1-pentene) (PMP) hollow fibers (HF) is examined. The melt spinning trials are carried out on a pilot scale melt spinning plant with different settings while a 10-hole 2c-shaped spinneret is used. It is found that the winding speed mainly affects the outer fiber diameter. The influence of different melt spinning parameters is investigated, in particular temperatures, take-up velocities, and the use of quench air. For this purpose, the shape and crystalline structure of the fibers are analyzed using a light microscope, a scanning electron microscope, and wide-angle X-ray scattering. The shape of the fibers is mainly influenced by the temperature settings in the melt spinning process. As a reasonable lower limit, a melt spinning temperature of 280°C is identified. Concerning the crystallinity, a saturation going along with a slight reduction of the polymer chain orientation is observed at elevated take-up velocities. |
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Keywords: | membranes fibers crystallization polyolefins |
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