Formation of ordered microphase-separated pattern during spin coating of ABC triblock copolymer

doi:10.1063/1.2710277

CORC > 化学研究所 > 中国科学院化学研究所

	Formation of ordered microphase-separated pattern during spin coating of ABC triblock copolymer
	Huang, Weihuan ; Luo, Chunxia ; Zhang, Jilin ; Han, Yanchun
刊名	JOURNAL OF CHEMICAL PHYSICS
	2007-03-14
卷号	126 期号:10
ISSN号	0021-9606
DOI	10.1063/1.2710277
英文摘要	In this paper, the authors have systematically studied the microphase separation and crystallization during spin coating of an ABC triblock copolymer, polystyrene-b-poly(2-vinylpyridine)-b-poly(ethylene oxide) (PS-b-P2VP-b-PEO). The microphase separation of PS-b-P2VP-b-PEO and the crystallization of PEO blocks can be modulated by the types of the solvent and the substrate, the spinning speed, and the copolymer concentration. Ordered microphase-separated pattern, where PEO and P2VP blocks adsorbed to the substrate and PS blocks protrusions formed hexagonal dots above the P2VP domains, can only be obtained when PS-b-P2VP-b-PEO is dissolved in N,N-dimethylformamide and the films are spin coated onto the polar substrate, silicon wafers or mica. The mechanism of the formation of regular pattern by microphase separation is found to be mainly related to the inducement of the substrate (middle block P2VP wetting the polar substrate), the quick vanishment of the solvent during the early stage of the spin coating, and the slow evaporation of the remaining solvent during the subsequent stage. On the other hand, the probability of the crystallization of PEO blocks during spin coating decreases with the reduced film thickness. When the film thickness reaches a certain value (3.0 nm), the extensive crystallization of PEO is effectively prohibited and ordered microphase-separated pattern over large areas can be routinely prepared. When the film thickness exceeds another definite value (12.0 nm), the crystallization of PEO dominates the surface morphology. For films with thickness between these two values, microphase separation and crystallization can simultaneously occur. (c) 2007 American Institute of Physics.
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000244895600029
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/62857]
专题	中国科学院化学研究所
通讯作者	Huang, Weihuan
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Grad Univ Chinese Acad Sci, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Huang, Weihuan,Luo, Chunxia,Zhang, Jilin,et al. Formation of ordered microphase-separated pattern during spin coating of ABC triblock copolymer[J]. JOURNAL OF CHEMICAL PHYSICS,2007,126(10).
APA	Huang, Weihuan,Luo, Chunxia,Zhang, Jilin,&Han, Yanchun.(2007).Formation of ordered microphase-separated pattern during spin coating of ABC triblock copolymer.JOURNAL OF CHEMICAL PHYSICS,126(10).
MLA	Huang, Weihuan,et al."Formation of ordered microphase-separated pattern during spin coating of ABC triblock copolymer".JOURNAL OF CHEMICAL PHYSICS 126.10(2007).