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	Prediction of solvent diffusion coefficient in amorphous polymers based on an equation-of-state
	Lv, HL ; Wang, BG
	2010-05-07 ; 2010-05-07
关键词	amorphous polymer diffusion coefficient equation-of-state (EOS) free-volume modeling FREE-VOLUME THEORY TEMPERATURE PVT EXPERIMENTS SIMHA-SOMCYNSKY ANALYSIS POSITRON LIFETIME SELF-DIFFUSION GLASSY-POLYMERS POLYSTYRENE SOLUBILITY SPECTROSCOPY PARAMETERS Polymer Science
中文摘要	This study develops a modified free-volume model to predict solvent diffusion coefficients in amorphous polymers by combining the Vrentas-Duda model with the Simha-Somcynsky (S-S) equation-of-state (EOS), and all the original parameters can be used in the modified model. The free volume of the polymer is estimated from the S-S EOS together with the Williams-Landel-Ferry fractional free volume, and the complex process of determining polymer free-volume parameters in the Vrentas-Duda model and measuring polymer viscoelasticity can be avoided. Moreover, the modified model includes the influence of not only temperature but also pressure on solvent diffusivity. Three common polymers and four solvents are employed to demonstrate the predictions of the modified model. The calculation results are generally consistent with the experimental values. It is reasonable to expect that the modified free-volume model will become a useful tool in polymer process development. (c) 2006 Wiley Periodicals, Inc.
语种	英语 ; 英语
出版者	JOHN WILEY & SONS INC ; HOBOKEN ; 111 RIVER ST, HOBOKEN, NJ 07030 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/17637]
专题	清华大学
推荐引用方式 GB/T 7714	Lv, HL,Wang, BG. Prediction of solvent diffusion coefficient in amorphous polymers based on an equation-of-state[J],2010, 2010.
APA	Lv, HL,&Wang, BG.(2010).Prediction of solvent diffusion coefficient in amorphous polymers based on an equation-of-state..
MLA	Lv, HL,et al."Prediction of solvent diffusion coefficient in amorphous polymers based on an equation-of-state".(2010).

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