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A new series of sil...
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Olsson, Nils,1970Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
(författare)
A new series of siloxane liquid crystalline dimers exhibiting the antiferroelectric phase
- Artikel/kapitelEngelska2005
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LIBRIS-ID:oai:gup.ub.gu.se/61331
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https://gup.ub.gu.se/publication/61331URI
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https://doi.org/10.1080/02678290500268176DOI
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https://research.chalmers.se/publication/61331URI
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In this paper, we report the study of a new series of symmetric chiral liquid crystalline siloxane dimers, their related monomers, and two of those monomers with heptamethyltrisiloxane attached. All the dimers coupled with a trisiloxane show the SmCA phase, which in several cases has a large tilt angle greater than 40° over a wide temperature range, as well as high spontaneous polarisation in the field-induced ferroelectric state. Spacer lengths of 3-6 and 11 carbons between the siloxane central unit and the mesogenic cores were used. Monomers with 3-6 carbons in the spacer showed only orthogonal phases while the monomer with an 11-carbon spacer, as well as the monomers with siloxane attached, have a high tilt angle ferroelectric phase. The materials were characterized by means of DSC, NMR, X-ray diffraction, electro-optical methods (tilt angle and texture characterization) and polarization measurements.
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Helgee, Bertil,1947Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Chalmers tekniska högskola,Chalmers University of Technology,University of Gothenburg(Swepub:gu)xhelbe
(författare)
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Andersson, GunnarGöteborgs universitet,University of Gothenburg
(författare)
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Komitov, Lachezar,1944Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg(Swepub:gu)xkomla
(författare)
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Göteborgs universitetInstitutionen för fysik (GU)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Liquid Crystals: Informa UK Limited32:9, s. 1139-11500267-82921366-5855
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