Issue |
EPL
Volume 86, Number 4, May 2009
|
|
---|---|---|
Article Number | 46006 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/86/46006 | |
Published online | 03 June 2009 |
Formation and kinetics of transient metastable states in mixtures under coupled phase ordering and chemical demixing
1
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: ersoule@fi.mdp.edu.ar
Received:
27
February
2009
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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