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A liquid crystalline co-polysiloxane with asymmetric bent-shaped side chains

SYSNO ASEP	0359391
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	A liquid crystalline co-polysiloxane with asymmetric bent-shaped side chains
Author(s)	Bubnov, Alexej (FZU-D)_{RID, ORCID, SAI} Novotná, Vladimíra (FZU-D)_{RID, ORCID, SAI} Pociecha, D. (PL) Kašpar, Miroslav (FZU-D)_RID Hamplová, Věra (FZU-D)_{RID, ORCID, SAI} Galli, G. (IT) Glogarová, Milada (FZU-D)_{RID, ORCID}
Source Title	Macromolecular Chemistry and Physics. - : Wiley - ISSN 1022-1352 Roč. 212, č. 2 (2011), s. 191-197
Number of pages	7 s.
Language	eng - English
Country	DE - Germany
Keywords	calorimetry ; liquid-crystalline polymers (LCP) ; phase behaviou ; polysiloxanes
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	IAA100100911 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GA202/09/0047 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	OC10006 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	MEB050818 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100520 - FZU-D (2005-2011)
UT WOS	000287056700009
DOI	10.1002/macp.201000356
Annotation	A co-polysiloxane has been prepared with an asymmetric bent-shaped side group based on a liquid crystalline monomer exhibiting the B2 (SmCP) phase, namely [4-(4’-undecenyloxy)biphenyl] [4-(4’-octyloxybiphenyl)-oxycarbonyl-4-(2-methoxyphenyl)] isophthalate. In order to dilute the side chain mesogens along the polymer backbone the octyl side chains were also incorporated. The X-ray studies confirmed that resulting co-polysiloxane exhibits a liquid crystalline layered phase, the siloxane polymer chains being microphase segregated from the incompatible side chain mesogens. The mesophase of polymer exhibits the homeotropic structure that can be successfully aligned by unidirectional shear. This phase does not exhibit polar switching under an applied electric field unlike the bent-core monomer, used as the side chains of this polymer. This can be caused by the homeotropic alignment of the polymer samples.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2012

Number of the records: 1