Synthesis and characterization of a new hydrogen bonded side chain liquid crystal block copolymer and investigation of electrical properties
Pure and Applied Chemistry, cilt.89, sa.1, ss.19-28, 2017 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Özet
- Cilt numarası: 89 Sayı: 1
- Basım Tarihi: 2017
- Doi Numarası: 10.1515/pac-2016-0816
- Dergi Adı: Pure and Applied Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.19-28
- Anahtar Kelimeler: hydrogen bonding, liquid crystalline polymers, POC-16, polyethylene glycol
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
A new PEG-containing liquid crystalline side chain block copolymer HBC-PEG550 was prepared from poly(ethylene glycol)-b-poly(2-(diethylamino) ethyl methacrylate copolymer (BC-PEG550) and 8-(4-cyanobiphenyl-4′-oxy) octan-1-ol (LC8) by molecular self-assembly processes via hydrogen bond formation between amine group of HBC-PEG550 and hydroxyl group of the LC8. The formation of H bond was confirmed by using FTIR spectroscopy. The liquid crystalline behavior of the HBC-PEG550 was investigated by differential scanning calorimeter (DSC) and polarized optical microscopy. Dielectric properties of HBC-PEG550 and HBC-PEG550 has been studied by impedance spectroscopy. Real and imaginary parts of complex dielectric constant, impedance, and energy loss tangent factor for HBC-PEG550 and HBC-PEG550 have been characterized in the frequency range of 100 Hz-15 MHz.