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- Title
Formation of a large-scale shish-kebab structure of polyoxymethylene in the melt spinning and the crystalline morphology evolution after hot stretching.
- Authors
Li, Lin; Zhou, Tao; Liu, Jianzhong; Ran, Qianping; Ye, Guangdou; Zhang, Jihai; Liu, Pengqing; Zhang, Aiming; Yang, Zhiqian; Xu, Degen; Liu, Jiaping
- Abstract
Polyoxymethylene (POM) fiber was produced by melt spinning with a high take-up speed, which imposed a strong flow field. An unexpected formation of a shish-kebab morphology with multiple shish of POM fibers was reported for the first time. This morphology is a large-scale shish kebab with a diameter of 10.5 µm. Further orientation of the POM fiber was obtained by hot stretching twice at 160°C. Two crystalline morphology evolution processes were also observed: (i) the process from the large-scale shish-kebab to the deformed small shish-kebab and (ii) the process from the deformed small shish-kebab to the perfect whiskers. Compared with the melt spinning fiber, fiber tensile strength with first and second hot stretching increased by 976% and 1705%, respectively. The crystalline melting behavior of fibers significantly changes after the first and second hot stretching. The flow field induces a large number of extended chain crystals. Copyright © 2014 John Wiley & Sons, Ltd.
- Subjects
POLYOXYMETHYLENE; MELT spinning; SKEWER cooking; CRYSTAL morphology; TENSILE strength
- Publication
Polymers for Advanced Technologies, 2015, Vol 26, Issue 1, p77
- ISSN
1042-7147
- Publication type
Article
- DOI
10.1002/pat.3422