Volume 86, Number 4, May 2009
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||03 June 2009|
Formation and kinetics of transient metastable states in mixtures under coupled phase ordering and chemical demixing
Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET) - J. B. Justo 4302, 7600 Mar del Plata, Argentina
2 Department of Chemical Engineering, McGill University - Montreal, Quebec H3A 2B2, Canada
Corresponding author: email@example.com
Accepted: 28 April 2009
We present theory and simulation of simultaneous chemical demixing and phase ordering in a polymer–liquid-crystal mixture in conditions where isotropic-isotropic phase separation is metastable with respect to isotropic-nematic phase transition. It is found that mesophase formation proceeds by a transient metastable phase that surround the ordered phase, and whose lifetime is a function of the ratio of diffusional-to-orientational mobilities. It is shown that kinetic phase ordering in polymer-mesogen mixtures is analogous to kinetic crystallization in polymer solutions.
PACS: 64.60.Bd – General theory of phase transitions / 64.60.My – Metastable phases / 64.70.mf – Theory and modeling of specific liquid crystal transitions, including computer simulation
© EPLA, 2009
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