Structure and morphology of linear polyethylene extrudates induced by elongational flow |
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| Authors: | Frantisek Rybnikar Martina Kaszonyiova Roman Cermak Veronika Habrova Martin Obadal |
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| Affiliation: | 1. Department of Production Engineering, Tomas Bata University in Zlin, Zlin, Czech Republic;2. Department of Polymer Engineering, Tomas Bata University in Zlin, Zlin, Czech Republic;3. Polymer Institute, Brno, Czech Republic;4. Borealis Polyolefine GmbH, Linz, Austria |
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| Abstract: | This study focuses on the structure, morphology, and properties of linear polyethylene (PE) profiles manufactured by continuous extrusion. High level of chain orientation was achieved using specific flow and processing conditions. An extrusion die with semihyperbolic convergency was used to generate high percentage of elongational flow and chain extension. Simultaneously, high extrusion pressure and relatively low melt temperature led to flow‐induced crystallization of PE extended chains. The structure of PE tapes consists of crystal aggregates with different level of orientation and crystallinity. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
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| Keywords: | morphology extrusion crystallization polyolefins |
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