Abstract
In this study, new side chain liquid crystalline copolymers were prepared from N-vinyl carbazole (NVC) and 2-(Dimethylamino)ethyl methacrylate) (DMAEM) as a hydrogen bond acceptor copolymer and 8-(4-cyanobiphenyl-4′-oxy)octan-1-ol (LC8) by molecular self-assembly processes via hydrogen bond formation between nitrogen of (DMAEM) and hydroxyl group of the LC8. The formation of H bond was confirmed by using FTIR spectroscopy. The liquid crystalline behavior of the copolymers and homopolymer of the (DMAEM) was investigated using a differential scanning calorimeter (DSC) and polarized optical microscopy. The dielectric relaxation properties of H-bonded Side Chain LC Copolymers (HB-LCP) doped 8-(4-cyanobiphenyl-4′-oxy)octan-1-ol (LC8) and pure LC8 liquid crystals have been investigated by the dielectric spectroscopy (DS) method. The dielectric behavior of the LCs shows a dielectric relaxation process. The relaxation frequency of the LCs was changed by the addition of HB-PLC. It is evaluated that the dielectric strength and relaxation properties of LC8 and LC8/HB-PLC LCs can be controlled by 1% HB-PLC dopant.
| Original language | English |
|---|---|
| Pages (from-to) | 144-150 |
| Number of pages | 7 |
| Journal | Materials Science in Semiconductor Processing |
| Volume | 28 |
| DOIs | |
| Publication status | Published - Dec 2014 |
Bibliographical note
Publisher Copyright:© 2014 Elsevier Ltd. All rights reserved.
Funding
This work was supported by the Scientific Research Project Coordination Center of Istanbul Technical University (ITU) (Scientific Research Project Fund with the Project number 37754) .
| Funders | Funder number |
|---|---|
| Istanbul Teknik Üniversitesi | 37754 |
Keywords
- (2-(Dimethylamino) ethyl methacrylate)
- Cole-Cole plot
- Dielectric spectroscopy
- Hydrogen bonding
- Liquid crystalline copolymer
- Poly (N-vinyl carbazole)-co-poly