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Universal solvent quality crossover of the zero shear rate viscosity of semidilute DNA solutions

DSpace at IIT Bombay

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Field Value
 
Title Universal solvent quality crossover of the zero shear rate viscosity of semidilute DNA solutions
 
Creator PAN, S
NGUYEN, DA
SRIDHAR, T
SUNTHAR, P
PRAKASH, JR
 
Subject DYNAMIC LIGHT-SCATTERING
DILUTE POLYMER-SOLUTIONS
MOLECULAR-WEIGHT
SALT CONCENTRATION
HYDRODYNAMIC-RADIUS
FLOW BIREFRINGENCE
DEPENDENCE
TRANSITION
FRAGMENTS
CHAIN
 
Description The scaling behavior of the zero shear rate viscosity of semidilute unentangled Deoxyribonucleic acid (DNA) solutions, in the double crossover regime driven by temperature and concentration, is mapped out by systematic experiments. The viscosity is shown to have a power law dependence on the scaled concentration c/c*, with an effective exponent that depends on the solvent quality parameter z. The determination of the form of this universal crossover scaling function requires the estimation of the theta-temperature of dilute DNA solutions in the presence of excess salt, and the determination of the solvent quality parameter at any given molecular weight and temperature. The h-temperature is determined to be T-theta approximate to 15 degrees C using static light scattering, and the solvent quality parameter has been determined by dynamic light scattering. (C) 2014 The Society of Rheology.
 
Publisher JOURNAL RHEOLOGY AMER INST PHYSICS
 
Date 2014-12-29T06:24:32Z
2014-12-29T06:24:32Z
2014
 
Type Article
 
Identifier JOURNAL OF RHEOLOGY, 58(2)339-368
0148-6055
http://dx.doi.org/10.1122/1.4861072
http://dspace.library.iitb.ac.in/jspui/handle/100/17303
 
Language English