Description: Conformational and rheological properties of semiflexible polymers in shear flow

This title appears in the Scientific Report : 2010

Conformational and rheological properties of semiflexible polymers in shear flow

A theoretical description is provided for the nonequilibrium conformational and dynamical properties of a polymer in shear flow. Using a mean-field semiflexible chain model, which accounts for hydrodynamic interactions within the preaveraging approximation, analytical expressions are derived for the...

Personal Name(s):	Winkler, R. G.
Contributing Institute:	Theorie der Weichen Materie und Biophysik; IAS-2 Theorie der Weichen Materie und Biophysik; IFF-2
Published in:	The @journal of chemical physics, 133 (2010) S. 164905
Imprint:	Melville, NY American Institute of Physics 2010
Physical Description:	164905
PubMed ID:	21033821
DOI:	10.1063/1.3497642
Document Type:	Journal Article
Research Program:	BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung
Series Title:	Journal of Chemical Physics 133
Subject (ZB):	Hydrodynamics Models, Chemical Molecular Conformation Polymers: chemistry Rheology Stress, Mechanical Polymers J
Link:	Get full text OpenAccess OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://hdl.handle.net/2128/19495 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.3497642 in citations.

A theoretical description is provided for the nonequilibrium conformational and dynamical properties of a polymer in shear flow. Using a mean-field semiflexible chain model, which accounts for hydrodynamic interactions within the preaveraging approximation, analytical expressions are derived for the dependence of the deformation, orientation, and relaxation times on polymer persistence length and shear rate. Moreover, the rheological properties of a dilute polymer solution are discussed. The model yields shear thinning at large Weissenberg numbers. The analytical results are compared with fluorescence microscopy measurements of individual DNA molecules, which yield qualitative and partial quantitative agreement.