Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 138, Issue 1, Pages -Publisher
WILEY
DOI: 10.1002/app.49630
Keywords
membranes; fibers; crystallization; polyolefins
Categories
Funding
- Deutsche Forschungsgemeinschaft [GR1311/94-1]
- Russian Science Foundation [19-49-04105]
- Russian Science Foundation [19-49-04105] Funding Source: Russian Science Foundation
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This article examines the melt spinning behavior of PMP hollow fibers, finding that the temperature setting in the process significantly affects fiber shape, while increased take-up velocities lead to saturation of crystallinity and a slight reduction in polymer chain orientation.
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 degrees 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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