期刊
POLYMER
卷 48, 期 19, 页码 5486-5492出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2007.05.047
关键词
gas-assisted injection molding; gas penetration; shish-kebab structure
To understand the crystalline morphology of the parts molded by gas-assisted injection molding (GAIM), in this work, the hierarchical structures and the crystalline morphology of gas-assisted injection molded high-density polyethylene (HDPE) were investigated. According to the comparison between the results of the GAIM part and those of the conventional injection molded counterpart, it is found that gas penetration can remarkably enhance the shear rate during GAIM process and oriented lamellar structure, shish-kebab structure and common spherulites arise in the skin, subskin and gas channel region, respectively, owing to the different shear rate in these regions. Meanwhile, cooling rate also plays an important role in the formation of the oriented crystalline structure. (C) 2007 Published by Elsevier Ltd.
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