Abstract/Details

Dynamics of polyelectrolyte solutions and diblock copolymer in an electric field


2004 2004

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Abstract (summary)

We present a theoretical treatment of the dynamic properties of polymer and polyelectrolyte solutions, incorporating the screening associated with hydrodynamic, excluded-volume and electrostatic interactions. The importance of inter-chain interactions in influencing properties like the viscosity of a polyelectrolyte solution is emphasized. This treatment is then extended to cover the case of living polymers, specifically, the rheological properties of wormlike micelles. We also investigate the effect of simple shear and elongational flows on the configurational and rheological properties of a single polymer chain. The coil-stretch transition of a polymer under elongational flow was investigated, results indicating a possible first order transition. We also study the behavior of confined diblock copolymers in lamellar and cylindrical morphologies when placed in an external electric field. The crucial parameter influencing the value of the critical electric field above which the diblock orients itself parallel to the field, is found to be the mismatch in the interfacial tensions between polymer and plate, with a mismatch in dielectric constants of the copolymer components also playing a role.

Indexing (details)


Subject
Condensation
Classification
0611: Condensation
Identifier / keyword
Pure sciences, Diblock copolymer, Electric field, Polyelectrolyte, Polymer rheology, Wormlike micelles
Title
Dynamics of polyelectrolyte solutions and diblock copolymer in an electric field
Author
Ashok, Balakrishnan
Number of pages
109
Publication year
2004
Degree date
2004
School code
0118
Source
DAI-B 65/11, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780496132034, 0496132032
Advisor
Muthukumar, Murugappan
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3152670
ProQuest document ID
305177270
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305177270
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