Dielectric properties of dual-frequency reactive mesogens before and after photopolymerization

Kumagai, Takayuki; Yoshida, Hiroyuki; Ozaki, Masanori

Materials, 2014, 7(2), 1113-1121

Number of Access:539（2025-09-02 10:21 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/75695

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Title
Dielectric properties of dual-frequency reactive mesogens before and after photopolymerization
Creator
CreatorName
Kumagai, Takayuki
NRID
1000080550045 1000080550045
researchmap permalink
hiroyukiyoshida hiroyukiyoshida
Scopus Author ID
55628543086 55628543086
CreatorName
Yoshida, Hiroyuki
NRID
1000050204186 1000050204186
ORCID
0000-0002-9556-4225 0000-0002-9556-4225
researchmap permalink
read0014092 read0014092
Scopus Author ID
55490143900 55490143900
CreatorName
Ozaki, Masanori
Subject
reactive mesogen
dielectric property
dual frequency
liquid crystal
photopolymerization
dielectric anisotropy
Abstract
The dielectric properties of reactive mesogens before and after photopolymerization were investigated. Commercially available nematic reactive mesogens (RMS03-013C, Merck) were measured and found to be dual-frequency liquid crystals. The property arose from the δ-relaxation process that was caused by rotational fluctuations parallel to the molecule’s long axis. After polymerization, the polymerized reactive mesogens still exhibited this dual-frequency property. The result was attributed to the β-relaxation process which arose from rotational fluctuations of localized parts of the main chain. The sign change of the dielectric anisotropy with increasing frequency after polymerization was opposite to the sign change before polymerization.
Publisher
MDPI
Source Title
Materials
Volume (Issue)
7(2)
Page
1113-1121
Date of Issued
2014-02-11
Language
English
Handle URL
https://hdl.handle.net/11094/75695
eISSN
19961944
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.3390/ma7021113
Access Rights
open access
CopyRight
© 2014 by the authors; licensee MDPI, Basel, Switzerland This article is licensed under a Creative Commons Attribution 3.0 Unported License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article