Rotational diffusion in polyacrylamide gels as a function of solvent quality
作者： W. Mikosch , Th. Dorfmüller , W. Eimer
DOI: 10.1063/1.468480
关键词: Viscoelasticity 、 Viscosity 、 Polymer 、 Rotational diffusion 、 Polymer chemistry 、 Chemical engineering 、 Polyacrylamide 、 Fluorescence anisotropy 、 Chemistry 、 Solvent 、 Matrix (chemical analysis)
摘要: We have investigated the rotational motion of dianion polyphenyl 2 (PP2) in polyacrylamide (PAA) gels by fluorescence anisotropy decay. A comparison dynamics probe molecule various solvent mixtures water–glycerol and water–methanol solution as well presence polymer matrix revealed a significant retardation reorientation with increasing PAA concentration. Having excluded specific interactions PP2 gel matrix, we suggest that modification viscosity is responsible for alteration dynamics. The effect strongly dependent on quality component, i.e., more distinct under good conditions (in pure water) than poor (increasing glycerol content). Changing crosslinker concentration from 0% to 4% obtained fluid‐like solutions viscoelastic gels. However, reorientational was independent macroscopic const...
scitation.org
harvard.edu
sci-hub.se 参考文章(40)
Alan H. Muhr, John M.V. Blanshard, Diffusion in gels Polymer. ,vol. 23, pp. 1012- 1026 ,(1982) , 10.1016/0032-3861(82)90402-5
Andrzej R. Altenberger, Matthew Tirrell, John S. Dahler, Hydrodynamic screening and particle dynamics in porous media, semidilute polymer solutions and polymer gels The Journal of Chemical Physics. ,vol. 84, pp. 5122- 5130 ,(1986) , 10.1063/1.450665
Rama Bansil, Manoj K. Gupta, Effect of varying crosslinking density on polyacrylamide gels Ferroelectrics. ,vol. 30, pp. 63- 71 ,(1980) , 10.1080/00150198008209489
Daniel J. Gisser, M. D. Ediger, Modification of solvent rotational dynamics by the addition of small molecules or polymers The Journal of Physical Chemistry. ,vol. 97, pp. 10818- 10823 ,(1993) , 10.1021/J100143A048
Daniel J. Gisser, Brian S. Johnson, M. D. Ediger, Ernst D. Von Meerwall, Comparison of various measurements of microscopic friction in polymer solutions Macromolecules. ,vol. 26, pp. 512- 519 ,(1993) , 10.1021/MA00055A017
Liqi Fang, Wyn Brown, Soeren Hvidt, Static and dynamic properties of polyacrylamide gels and solutions in mixtures of water and glycerol: a comparison of the application of mean-field and scaling theories Macromolecules. ,vol. 25, pp. 3137- 3142 ,(1992) , 10.1021/MA00038A018
Robert E. Wing, Sukumar Maiti, William M. Doane, Amylose content of starch controls the release of encapsulated bioactive agents Journal of Controlled Release. ,vol. 7, pp. 33- 37 ,(1988) , 10.1016/0168-3659(88)90077-6
R. I. Cukier, Diffusion of Brownian spheres in semidilute polymer solutions Macromolecules. ,vol. 17, pp. 252- 255 ,(1984) , 10.1021/MA00132A023
W. Brown, G. Kloow, K. Chitumbo, T. Amu, Solute diffusion in polymer networks. Part 3.—Hydroxyethylcellulose gels; solvent effects and fluorescence depolarisation measurements Journal of the Chemical Society, Faraday Transactions. ,vol. 72, pp. 485- 494 ,(1976) , 10.1039/F19767200485
George D. J. Phillies, Quantitative prediction of .alpha. in the scaling law for self-diffusion Macromolecules. ,vol. 21, pp. 3101- 3106 ,(1988) , 10.1021/MA00188A031