Influence of spacer length on the dielectric relaxation of a side chain liquid crystal polymer

Autor:	W. L. Gordon, Z. Z. Zhong, D. E. Schuele
Rok vydání:	1994
Předmět:	chemistry.chemical_classification Materials science Mesogen General Chemistry Dielectric Condensed Matter Physics Crystallography chemistry Liquid crystal Phase (matter) Side chain Relaxation (physics) Organic chemistry General Materials Science Pendant group Alkyl
Zdroj:	Liquid Crystals. 17:199-209
ISSN:	1366-5855 0267-8292
DOI:	10.1080/02678299408036560
Popis:	The dielectric relaxation study on a set of polyvinylether based cyanobiphenyl side chain liquid crystal polymers with three different alkyl spacer lengths of 7, 9, and 11 shows that the spacer decouples the motion of the mesogen from the polymer backbone so that both the low-frequency δ process and the high-frequency α process of the side group have been detected in smectic A phase. At a given temperature the relaxation frequency increases with spacer length for the α process. This trend is also observed for the λ process except for the longest spacer length.
Databáze:	OpenAIRE
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