Formation mechanism, chain folding, and growth behavior of the intriguing fiber-like crystal of poly (ethylene oxide-b-epsilon-caprolactone) block copolymer in ultrathin films

doi:10.1016/j.polymer.2011.02.044

CORC > 化学研究所 > 中国科学院化学研究所

	Formation mechanism, chain folding, and growth behavior of the intriguing fiber-like crystal of poly (ethylene oxide-b-epsilon-caprolactone) block copolymer in ultrathin films
	Zhao, Junchai 1; Zhang, Jianmin 1; Duan, Xiaoli 2,3; Peng, Zheng 1; Wang, Shaohui 1
刊名	POLYMER
	2011-04-19
卷号	52 期号:9 页码:2085-2093
关键词	Fiber-like Crystal Poly (Ethylene Oxide-b-epsilon-caprolactone) Ultrathin Film
ISSN号	0032-3861
DOI	10.1016/j.polymer.2011.02.044
英文摘要	The morphologies, crystallization behavior and chain orientation of a highly asymmetric poly (ethylene oxide-b-epsilon-caprolactone) (PEO-b-PCL) block copolymer ultrathin films were investigated by using wide-angle X-ray diffraction (WAXD), atomic force microscopy (AFM) and grazing incidence X-ray diffraction (GIXRD) techniques. It is shown that the intriguing fiber-like crystal which seems to be an individual flat-on lamella was first observed in PEO-b-PCL ultrathin film according to our knowledge. The possible mechanism of forming the fiber-like crystals is chiefly ascribed to the rather low molecular weight of PEO-b-PCL and the mutual interaction between crystallization and microphase separation. At the same time, solution concentration and substrate surface energy play a crucial role. Subsequently, chain folding of the fiber-like crystal of PEO-b-PCL in ultrathin films was deduced based on the cell parameters and the lamellar thickness. Isothermal crystallization tests revealed that in the whole growth process, the crystal growths can be divided into two stages, both of which followed the diffusion-limited (DL) mechanism. (C) 2011 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000289744400027
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/71645]
专题	中国科学院化学研究所
通讯作者	Zhao, Junchai
作者单位	1.Shijiazhuang Tiedao Univ, Sch Mat Sci & Engn, Shijiazhuang 050043, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Joint Lab Polymer Sci & Mat,CAS Key Lab Engn Plas, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Junchai,Zhang, Jianmin,Duan, Xiaoli,et al. Formation mechanism, chain folding, and growth behavior of the intriguing fiber-like crystal of poly (ethylene oxide-b-epsilon-caprolactone) block copolymer in ultrathin films[J]. POLYMER,2011,52(9):2085-2093.
APA	Zhao, Junchai,Zhang, Jianmin,Duan, Xiaoli,Peng, Zheng,&Wang, Shaohui.(2011).Formation mechanism, chain folding, and growth behavior of the intriguing fiber-like crystal of poly (ethylene oxide-b-epsilon-caprolactone) block copolymer in ultrathin films.POLYMER,52(9),2085-2093.
MLA	Zhao, Junchai,et al."Formation mechanism, chain folding, and growth behavior of the intriguing fiber-like crystal of poly (ethylene oxide-b-epsilon-caprolactone) block copolymer in ultrathin films".POLYMER 52.9(2011):2085-2093.