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The relationship between mechanical properties and morphology of vibration‐injection‐molded polyethylene
Author(s) -
Youbing Li,
Xueqin Gao,
Shaoyan Yuan,
Yi Yuan,
Jie Zhang,
Wenti Ke,
Kaizhi Shen
Publication year - 2005
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1698
Subject(s) - vibration , materials science , composite material , molding (decorative) , lamella (surface anatomy) , polyethylene , toughness , high density polyethylene , mechanical vibration , amplitude , acoustics , physics , quantum mechanics
This paper introduces a novel melt vibration‐injection molding. The effect of mid‐frequency melt vibration on mechanical properties was introduced, and SEM, WAXD and DSC investigations had been employed to provide evidence for explaining the relationship between mechanical properties and morphology of vibration‐injection‐molded specimens. The results show that the effect of vibration frequency is very different from that of vibration pressure amplitude. At a given vibration pressure amplitude, the increase of vibration frequency is beneficial for obtaining preferential orientation, more perfect lamellae and enhanced mechanical properties. For a given vibration frequency, increase of vibration pressure amplitude is a pre‐requisite for the achievement of a large‐scale lamella, more pronounced orientation, increase of cyrstallinity and high strength of high‐density polyethylene, but part of the toughness is lost. Copyright © 2004 Society of Chemical Industry