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Effect of Composition on The Morphology and Electro-Optical Properties of Physically Crosslinked Liquid Crystals

Published online by Cambridge University Press:  10 February 2011

A. Schneider ,
S. Geppert ,
R.J. Spontak ,
W. Gronski  and
H. Finkelmann
A. Schneider
Affiliation:
Institut für Makromolekulare Chemie, Albert-Ludwigs Universität Freiburg, D-79104 Freiburg i.Br., Germany
S. Geppert
Affiliation:
Institut für Makromolekulare Chemie, Albert-Ludwigs Universität Freiburg, D-79104 Freiburg i.Br., Germany
R.J. Spontak
Affiliation:
Institut für Makromolekulare Chemie, Albert-Ludwigs Universität Freiburg, D-79104 Freiburg i.Br., Germany
W. Gronski
Affiliation:
Institut für Makromolekulare Chemie, Albert-Ludwigs Universität Freiburg, D-79104 Freiburg i.Br., Germany
H. Finkelmann
Affiliation:
Institut für Makromolekulare Chemie, Albert-Ludwigs Universität Freiburg, D-79104 Freiburg i.Br., Germany
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Abstract

Addition of an ABA triblock copolymer to a midblock-selective solvent can, depending on copolymer/blend composition and the magnitude of block-block and block-solvent interactions, result in the formation of a physical network that is stabilized by aggregates of the incompatible A-block. In this work, an ABA copolymer with a nematic side-chain liquid crystal midblock is added to a low-molar-mass nematic liquid crystal (LC) in an effort to produce a comparable copolymer network and bind the LC matrix. This nanostructured system, designated a physically crosslinked liquid crystal (PCLC), may not suffer as much from the constraint-induced LC anchoring problems associated with conventional polymer-dispersed liquid crystals (PDLCs). Results presented here demonstrate that hierarchical phase behavior must be carefully considered in the design of PCLCs.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 559: Symposium D – Liquid Crystals Materials and Devices , 1999 , 177
Copyright
Copyright © Materials Research Society 1999

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References

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