IngentaConnect The relationship between mechanical properties and morphology of ...

Authors: Li Youbing¹; Gao Xueqin¹; Yuan Shaoyan¹; Yuan Yi¹; Zhang Jie¹; Ke Wenti¹; Shen Kaizhi¹

Source: Polymer International, Volume 54, Number 1, January 2005 , pp. 240-245(6)

Abstract:

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

Keywords: vibration injection molding; high-density polyethylene; mechanical property; morphology

Document Type: Research article

DOI: 10.1002/pi.1698

Affiliations: 1: College of Polymer Science and Engineering, The State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China

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The relationship between mechanical properties and morphology of vibration-injection-molded polyethylene