Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/10054/4748
Title: Flexible ring polymers in an obstacle environment: Molecular theory of linear viscoelasticity
Authors: IYER, BVS
LELE, AK
JUVEKAR, VA
Keywords: Dynamics Simulations
Computer-Simulation
Branched Polymers
Polystyrenes
Chain
Polyethylene
Reptation
Melt
Issue Date: 2006
Publisher: AMERICAN PHYSICAL SOC
Citation: PHYSICAL REVIEW E, 74(2), -
Abstract: We formulate a coarse-grained mean-field approach to study the dynamics of the flexible ring polymer in any given obstacle (gel or melt) environment. The similarity of the static structure of the ring polymer with that of the ideal randomly branched polymer is exploited in formulating the dynamical model using aspects of the pom-pom model for branched polymers. The topological constraints are handled via the tube model framework. Based on our formulation we obtain expressions for diffusion coefficient D, relaxation times tau, and dynamic structure factor g(k,t). Further, based on the framework we develop a molecular theory of linear viscoelasticity for ring polymers in a given obstacle environment and derive the expression for the relaxation modulus G(t). The predictions of the theoretical model are in agreement with previously proposed scaling arguments and in qualitative agreement with the available experimental results for the melt of rings.
URI: http://dx.doi.org/10.1103/PhysRevE.74.021805
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4748
http://hdl.handle.net/10054/4748
ISSN: 1539-3755
Appears in Collections:Article

Files in This Item:
File Description SizeFormat 
497.pdf277.26 kBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.