Next Article in Journal
Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses
Previous Article in Journal
The Effect of Exogenous Zinc Concentration on the Responsiveness of MC3T3-E1 Pre-Osteoblasts to Surface Microtopography: Part II (Differentiation)
Materials 2014, 7(2), 1113-1121; doi:10.3390/ma7021113
Article

Dielectric Properties of Dual-Frequency Reactive Mesogens before and after Photopolymerization

1
,
1,2,*  and 1
Received: 30 December 2013 / Revised: 27 January 2014 / Accepted: 7 February 2014 / Published: 11 February 2014
View Full-Text   |   Download PDF [689 KB, uploaded 11 February 2014]   |   Browse Figures

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.
Keywords: reactive mesogen; dielectric property; dual frequency; liquid crystal; photopolymerization; dielectric anisotropy reactive mesogen; dielectric property; dual frequency; liquid crystal; photopolymerization; dielectric anisotropy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Kumagai, T.; Yoshida, H.; Ozaki, M. Dielectric Properties of Dual-Frequency Reactive Mesogens before and after Photopolymerization. Materials 2014, 7, 1113-1121.

View more citation formats

Article Metrics

Comments

Citing Articles

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert