COPOLYSILOXANES AS PYROELECTRIC LANGMUIR-BLODGETT-FILMS

Richardson, T. and Holder, S.J. and Lacey, D. (1993) COPOLYSILOXANES AS PYROELECTRIC LANGMUIR-BLODGETT-FILMS. Molecular Crystals and Liquid Crystals Science and Technology Section a-Molecular Crystals and Liquid Crystals, 234 . pp. 685-690. ISSN 1058-725X. (The full text of this publication is not available from this repository)

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Abstract

A series of aliphatic acid side-chain copolysiloxanes based on a poly(hydrogenmethyldimethylsiloxane) backbone have been synthesised and evaluated. The length of the aliphatic acid side-chain of each compound has been varied in order to examine the effect on the Langmuir film properties. The surface pressure - area isotherms have indicated that each copolysiloxane forms a stable monomolecular layer on a pure water subphase. Alternate layer structures, in which each siloxane copolymer is co-deposited with a monomeric eicosylamine, have been prepared in order to measure their static pyroelectric coefficients. The magnitude of the coefficient increases as the length of the aliphatic acid side-chain is reduced. The thickness dependence of the coefficient has also been characterised for one of the copolysiloxane derivatives and shows that the pyroelectric effect is greatest for a 25 layer sample (13 layers of copolysiloxane 8/12 layers of eicosylamine).

Item Type: Article
Additional information: 3 GORDON BREACH SCI PUBL LTD MN007
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Simon Holder
Date Deposited: 01 Oct 2010 14:47
Last Modified: 05 Dec 2011 12:54
Resource URI: http://kar.kent.ac.uk/id/eprint/11735 (The current URI for this page, for reference purposes)
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