Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

May 2004

Comments

Copyright American Physical Society. Reprinted from Physical Review Letters, Volume 92, Issue 18, Article 185704, May 2004, 4 pages.
Publisher URL: http://dx.doi.org/10.1103/PhysRevLett.92.185704

Abstract

The kinetics of phase separation in thin polymer blend films displaying discrete and bicontinuous domain morphologies are examined. For discrete domains, the correlation length ξ grows as t1/3, in agreement with a coalescence model. By plotting ξ/d vs t/ti (initiation time), universal growth behavior is obtained for thickness values (d) from 1000 to 190 nm. In contrast, bicontinuous domains grow with a decreasing exponent, 0.62 to 0.28, as d decreases from 900 to 90 nm (i.e., no universal growth). This slowing down with reduced dimensionality suggests suppression of lateral hydrodynamic pumping.

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Date Posted: 20 December 2005

This document has been peer reviewed.