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Structure and morphology of linear polyethylene extrudates induced by elongational flow
Author(s) -
Rybnikar Frantisek,
Kaszonyiova Martina,
Cermak Roman,
Habrova Veronika,
Obadal Martin
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38323
Subject(s) - extrusion , crystallinity , polyethylene , materials science , crystallization , morphology (biology) , composite material , flow (mathematics) , melt flow index , die (integrated circuit) , reactive extrusion , linear low density polyethylene , polymer chemistry , polymer , chemical engineering , mathematics , nanotechnology , geometry , copolymer , biology , engineering , genetics
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