The nature of phase transitions of symmetric diblock copolymer melts under confinement

doi:10.1016/j.polymer.2007.05.045

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	The nature of phase transitions of symmetric diblock copolymer melts under confinement
	Miao, Bing ; Yan, Dadong ; Wickham, Robert A.; Shi, An-Chang
刊名	POLYMER
	2007-06-29
卷号	48 期号:14 页码:4278-4287
关键词	Diblock Copolymer Phase Transition Confinement
ISSN号	0032-3861
DOI	10.1016/j.polymer.2007.05.045
英文摘要	The effects of confinement, both the structure frustration and the surface field, on phase transitions of symmetric diblock copolymer melts are investigated within several theoretical methods on the mean-field level. Confinements are applied by restricting polymer chains in the finite spaces of slabs. The surface can be neutral or preferential depending on the strength of the surface field. Within the one-dimensional self-consistent mean-field theory, for the neutral surface case, an oscillative behavior is observed for the size dependence of the order-disorder transition (ODT) point (chi N)(t) due to the structure frustration. The spinodal (chi N)(s) for this corresponding confined system is also calculated using the Gaussian fluctuation theory and the Landau-Brazovskii theory, and (chi N)(s) coincides exactly with (chi N)(t). On the other hand, the surface effect plays the role to decrease (chi N)(t) due to the surface-induced spatial oscillation for the preferential surface case. In all confined systems considered, the ODT for symmetric diblock copolymer melts is a continuous second-order phase transition in the present mean-field calculation. (c) 2007 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000247855300044
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/61405]
专题	中国科学院化学研究所
通讯作者	Yan, Dadong
作者单位	1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, State Key Lab Polymer Phys & Chem,BNLMS, Beijing 100080, Peoples R China 2.St Francis Xavier Univ, Dept Phys, Antigonish, NS B2G 2W5, Canada 3.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
推荐引用方式 GB/T 7714	Miao, Bing,Yan, Dadong,Wickham, Robert A.,et al. The nature of phase transitions of symmetric diblock copolymer melts under confinement[J]. POLYMER,2007,48(14):4278-4287.
APA	Miao, Bing,Yan, Dadong,Wickham, Robert A.,&Shi, An-Chang.(2007).The nature of phase transitions of symmetric diblock copolymer melts under confinement.POLYMER,48(14),4278-4287.
MLA	Miao, Bing,et al."The nature of phase transitions of symmetric diblock copolymer melts under confinement".POLYMER 48.14(2007):4278-4287.