Synthesis and characterization of a new hydrogen bonded side chain liquid crystal block copolymer and investigation of electrical properties

Abstract

Abstract 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.

Keywords

Chemistry Copolymer Ethylene glycol Differential scanning calorimetry Polymer chemistry Dielectric spectroscopy Side chain Hydrogen bond Dielectric Dissipation factor Fourier transform infrared spectroscopy Methacrylate Physical chemistry Molecule Chemical engineering Organic chemistry Polymer Materials science Electrochemistry

Subject Areas

Liquid Crystal Research Advancements ·Electronic, Optical and Magnetic Materials ·Physical Sciences

Supramolecular Self-Assembly in Materials ·Biomaterials ·Physical Sciences

Polydiacetylene-based materials and applications ·Organic Chemistry ·Physical Sciences

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Synthesis and characterization of a new hydrogen bonded side chain liquid crystal block copolymer and investigation of electrical properties

Abstract

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