Volume 64, Number 3, November 2003
|Page(s)||337 - 343|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 November 2003|
Continuous crossover from oblate to prolate backbone conformations in nematic side-chain polymers
FOM Institute for Atomic and Molecular Physics (AMOLF) Kruislaan 407, 1012 DW, Amsterdam, The Netherlands
Accepted: 18 August 2003
We present a density functional formalism for the phase behaviour of side-chain liquid-crystalline polymers. The theory explicitly takes into account the full molecular geometry, the different character of the constituents, and the flexibility of the molecular components. We obtain results on bulk properties as well as the local distribution of orientational order within the polymers. The theory rules out the possibility of nematic-nematic phase transitions, and we observe a continuous crossover from oblate to prolate backbone conformations, in contrast to earlier predictions.
PACS: 61.30.Cz – Molecular and microscopic models and theories of liquid crystal structure / 61.30.Vx – Polymer liquid crystals / 64.70.Md – Transitions in liquid crystals
© EDP Sciences, 2003
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