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	Numerical simulation of surface effects on spinodal decomposition in polymer binary mixture: Quench depth dependence
	Yan, LT ; Xie, XM
	2010-05-07 ; 2010-05-07
关键词	PHASE-SEPARATION DYNAMICS LIQUID-CRYSTALLINE COPOLYESTER MONTE-CARLO BLEND FILMS THIN-FILMS MORPHOLOGY KINETICS GROWTH MODEL FLUCTUATIONS Polymer Science
中文摘要	The surface-directed spinodal decomposition (SDSD) in binary polymer mixture with different quench depths is investigated by numerical simulations, combining Cahn-Hilliard-Cook (CHC) theory with Flory-Huggins-de Gennes theory. The formation mechanisms of the wetting layer with different quench depths are discussed. The simulated results demonstrate that the growth of the wetting layer can exhibit pure diffusion-limited growth law, logarithm growth law,,,and Lifshitz-Slyozov (LS) growth law with the increasing quench depth, which reproduces experimental observations. Furthermore, the detailed ranges of these three regimes are determined on the basis of simulated results. The growth law of the wetting layer is pure diffusion-limited growth law when chi N < 2.01. In the case of 2.08 <= chi N, the growth of the wetting layer obeys LS growth law. However, when 2.01 <= chi N < 2.08, the logarithm growth law of the wetting layer is favored. The simulated results also demonstrate that the evolution of the polymer morphology in the parallel cross sections near the substrate surface obeys LS growth law. Moreover. the orientation effect of the surface on the dynamic behavior of these cross sections with deeper quench depth is more remarkable than that with shallower one.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/17789]
专题	清华大学
推荐引用方式 GB/T 7714	Yan, LT,Xie, XM. Numerical simulation of surface effects on spinodal decomposition in polymer binary mixture: Quench depth dependence[J],2010, 2010.
APA	Yan, LT,&Xie, XM.(2010).Numerical simulation of surface effects on spinodal decomposition in polymer binary mixture: Quench depth dependence..
MLA	Yan, LT,et al."Numerical simulation of surface effects on spinodal decomposition in polymer binary mixture: Quench depth dependence".(2010).

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