Insight into growth details and characteristics of windmill-like polyethylene crystals

doi:10.1016/j.polymer.2009.08.008

CORC > 化学研究所 > 中国科学院化学研究所

	Insight into growth details and characteristics of windmill-like polyethylene crystals
	Wang, Jie; Li, Ligui; Yang, Xiaoniu
刊名	POLYMER
	2009-09-23
卷号	50 期号:20 页码:4950-4956
关键词	Polyethylene Crystallisation Morphology
ISSN号	0032-3861
DOI	10.1016/j.polymer.2009.08.008
英文摘要	The crystallization detail of polyethylene (PE) has been scarcely studied via in-situ approach since it is an extremely fast process. In this work, optical microscopy is used to investigate crystallization details and characteristics of windmill-like polyethylene crystals. It has been shown that the straight edges of the petals appear firstly and grow in pairs from their central junctions, which subsequently induce the surrounding domains in between each pairs of petals to nucleate and crystallize into twisted lamellar overgrowths. The remaining terrace-stacked lamellae which form curved edges of the petals start to develop only after the straight edges of the petals together with the twisted lamellar overgrowths have completed their growth. It is confirmed that the preferential growth direction of these petals are along crystallographic [113] axis, which has an angle of 65, with the typical direction along b-axis adopted also by the twisted lamellar overgrowths. The crystallization kinetics is analyzed in terms of Avrami equation and an Avrami exponent n = 2 is thus obtained, which is consistent with the morphological observations of heterogeneous nucleation and 2-dimensional growth for these PE crystals. The melting behaviors of these crystals are exactly the reversed process of crystallization. (C) 2009 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000272959300025
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/67271]
专题	中国科学院化学研究所
通讯作者	Yang, Xiaoniu
作者单位	Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jie,Li, Ligui,Yang, Xiaoniu. Insight into growth details and characteristics of windmill-like polyethylene crystals[J]. POLYMER,2009,50(20):4950-4956.
APA	Wang, Jie,Li, Ligui,&Yang, Xiaoniu.(2009).Insight into growth details and characteristics of windmill-like polyethylene crystals.POLYMER,50(20),4950-4956.
MLA	Wang, Jie,et al."Insight into growth details and characteristics of windmill-like polyethylene crystals".POLYMER 50.20(2009):4950-4956.