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Morphological considerations on the mechanical properties of blown high-density polyethylene films

✍ Scribed by Yong-Man Kim; Chul-Hwan Kim; Jung-Ki Park; Cheol-Woo Lee; Tae-Ik Min

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 751 KB
Volume: 63
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19970118)63:3<289::aid-app3>3.0.co;2-j

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✦ Synopsis

Blown films having a broad range of morphologies were prepared from high-density polyethylenes (HDPE) with unimodal and bimodal molecular weight distribution under several processing conditions, and the effect of their morphological features on the dart drop impact resistance, Elmendorf tear strength, and tensile properties of the films has been studied. The organization of lamellar stacks seems to play a critical role on the mechanical properties of the blown HDPE films. The dart drop impact resistance of the blown HDPE films is highly dependent on the presence of the network structure of lamellar stacks and the level of the intraconnectivity and interconnectivity of lamellar stacks. The coherent orientation of lamellar stacks leads to significant anisotropy of tear and tensile properties.

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