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Kinetics of phase separation in polymer mixtures: A molecular dynamics study

Singh, Awaneesh and Puri, Sanjay and Dasgupta, Chandan (2014) Kinetics of phase separation in polymer mixtures: A molecular dynamics study. In: JOURNAL OF CHEMICAL PHYSICS, 140 (24).

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Official URL: http://dx.doi.org/10.1063/1.4884824

Abstract

We present detailed results from a molecular dynamics (MD) simulation of phase-separation kinetics in polymer mixtures. Our MD simulations naturally incorporate hydrodynamic effects. We find that polymeric phase separation (with dynamically symmetric components) is in the same universality class as segregation of simple fluids: the degree of polymerization only slows down the segregation kinetics. For d = 2 polymeric fluids, the domain growth law is L(t) similar to t(phi) with phi showing a crossover from 1/3 -> 1/2 -> 2/3. For d = 3 polymeric fluids, we see the crossover phi = 1/3 -> 1. Our MD simulations do not yet access the inertial hydrodynamic regime (with L similar to t(2/3)) of phase separation in 3-d fluids. (C) 2014 AIP Publishing LLC.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 26 Aug 2014 06:43
Last Modified: 26 Aug 2014 06:43
URI: http://eprints.iisc.ac.in/id/eprint/49676

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