Crystalline Morphology and Mechanical Property of Polyethylene Parts Prepared by Gas assisted Injection Molding

doi:10.19491/j.issn.1001-9278.2012.10.012

China Plastics ›› 2012, Vol. 26 ›› Issue (10): 70-83 .DOI: 10.19491/j.issn.1001-9278.2012.10.012

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Crystalline Morphology and Mechanical Property of Polyethylene Parts Prepared by Gas assisted Injection Molding

Quanping ZHANG Long WANG Kai ZHANG Nan SUN Ruiyan ZHANG Jingjing WU Mingbo YANG

Received:2012-06-01 Revised:1900-01-01 Online:2012-10-26 Published:2012-10-26

Abstract

Abstract: The effects of polyethylene molecular parameters and processing conditions on crystalline morphology of gasassisted injection molded (GAIM) polyethylene and relationships between the crystalline morphology and mechanical property were introduced. Due to the enhanced shear fields induced by melt short shot and gas penetration, polymer chains were partially oriented along the flow direction and the hierarchical crystal structures were further formed in parts during the subsequent cooling stage of GAIM process. In this paper, combined molecular parameters of polyethylene with molding process, the formation mechanism of hierarchical morphology during GAIM was explored.

Key words: polyethylene, gas-assisted injection molding, mechanical property, hierarchical morphology, formation mechanism

CLC Number:

TQ325.1

Quanping ZHANG Long WANG Kai ZHANG Nan SUN Ruiyan ZHANG Jingjing WU Mingbo YANG. Crystalline Morphology and Mechanical Property of Polyethylene Parts Prepared by Gas assisted Injection Molding[J]. China Plastics, 2012, 26(10): 70-83 .

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Crystalline Morphology and Mechanical Property of Polyethylene Parts Prepared by Gas assisted Injection Molding

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