Effect of concentration reduction due to adsorption on the reduced viscosity of polymer solution in extremely dilute concentration regime

doi:10.1016/j.polymer.2005.08.080

CORC > 化学研究所 > 中国科学院化学研究所

	Effect of concentration reduction due to adsorption on the reduced viscosity of polymer solution in extremely dilute concentration regime
	Cai, JL ; Cheng, RS ; Bo, SQ
刊名	POLYMER
	2005-11-14
卷号	46 期号:23 页码:10457-10465
关键词	Concentration Reduction Polymer Adsorption Adsorption Layer Thickness
ISSN号	0032-3861
DOI	10.1016/j.polymer.2005.08.080
英文摘要	The phenomena of reduced viscosity bending up and sometimes appearing a maximum in extremely dilute concentration regime of polymer solution are resulted from the concentration reduction due to adsorption of polymer onto the glass capillary wall. A quantitative theoretical description of this effect based on Langmuir adsorption isotherm is given. Applying the deduced formula to fit Ohm's precisely measured reduced viscosity data of polystyrene, linear and branched polyvinyl acetate solutions for three viscometers with different capillary radius gave satisfactory results. The radius dependence of the effective adsorption layer thickness of these polymers indicates it consists of two parts, that is a true adsorption layer and a repulsion layer between anchored chains on the capillary surface and flowing chains in solution. The reduced viscosities of an ultranigh molar mass polyethylene oxide sample in aqueous solution were measured both by an ordinary glass viscometer and by a viscometer constructed with a polytetrafluoroethylene capillary. The former exhibits a maximum due to adsorption and the later possesses the typical behavior of slipping flow. After correction for solute adsorption and slippage, respectively, the two sets of data coincide well and gave a common linear reduced viscosity plot down to extremely dilute concentration regime. (c) 2005 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000232893700102
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/56361]
专题	中国科学院化学研究所
作者单位	1.S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510641, Peoples R China 2.E China Univ Sci & Technol, Sch Mat Sci & Engn, Natl Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China 3.Nanjing Univ, Coll Chem & Chem Engn, Dept Biochem, Nanjing 210093, Peoples R China 4.Nanjing Univ, Coll Chem & Chem Engn, Natl Lab Pharmaceut Biotechnol, Nanjing 210093, Peoples R China 5.Nanjing Univ, Coll Chem & Chem Engn, Key Lab Mesoscop Mat Sci, Nanjing 210093, Peoples R China 6.Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Cai, JL,Cheng, RS,Bo, SQ. Effect of concentration reduction due to adsorption on the reduced viscosity of polymer solution in extremely dilute concentration regime[J]. POLYMER,2005,46(23):10457-10465.
APA	Cai, JL,Cheng, RS,&Bo, SQ.(2005).Effect of concentration reduction due to adsorption on the reduced viscosity of polymer solution in extremely dilute concentration regime.POLYMER,46(23),10457-10465.
MLA	Cai, JL,et al."Effect of concentration reduction due to adsorption on the reduced viscosity of polymer solution in extremely dilute concentration regime".POLYMER 46.23(2005):10457-10465.