Nonequilibrium phase behaviour of a chiral side chain polymer

The phase behaviour of an LC polysiloxane is found to depend on the previous history of the sample. Fast cooling from the isotropic state results in the formation of a nonequilibrium, highly transparent, and poorly birefringent layered mesophase, (an amorphous TGB-like smectic structure has been sug...

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Bibliographic Details
Published in:European polymer journal 1998-11, Vol.34 (11), p.1629-1636
Main Authors: Kozlovsky, M.V, Darius, M, Haase, W
Format: Article
Language:English
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Summary:The phase behaviour of an LC polysiloxane is found to depend on the previous history of the sample. Fast cooling from the isotropic state results in the formation of a nonequilibrium, highly transparent, and poorly birefringent layered mesophase, (an amorphous TGB-like smectic structure has been suggested). In contrast, thin samples annealed by several heating/cooling cycles or in an electric field form conventional smectic phases of the A* and C* types. The pyroelectric effect, optical switching and soft mode of these phases have been studied.
ISSN:0014-3057
1873-1945
DOI:10.1016/S0014-3057(98)00019-6