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Morphological features of blown high‐density polyethylene films
Author(s) -
Kim YongMan,
Kim ChulHwan,
Park JungKi,
Kim JungWhan,
Min TaeIk
Publication year - 1996
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/(sici)1097-4628(19960906)61:10<1717::aid-app12>3.0.co;2-#
Subject(s) - high density polyethylene , polyethylene , materials science , composite material , polymer science , low density polyethylene , morphology (biology) , chemical engineering , polymer chemistry , geology , engineering , paleontology
The blown films of high‐density polyethylenes with unimodal and bimodal molecular weight distribution were prepared under several processing conditions, and their morphologies were extensively characterized. The high molecular weight tail (MW > ∼ 10 6 ) of the molecular weight distribution seems to play a critical role on the morphology of blown highdensity polyethylene films irrespective of the molecular weight distribution mode of the resins. As the content of high molecular weight species increased, the tendency for high stress‐crystallization increased and the network structure of lamellar stacks was better developed. The intercrystalline connectivity along the normal direction of lamellar stacks was higher than that along the transverse direction of lamellar stacks. © 1996 John Wiley & Sons, Inc.