Fourier Transformed Infrared (FTIR) Spectroscopy for Analysis of Cholesteryl Acrylate Liquid Crystall-Indium Tin Oxide Composites Afrizal, Arif Rahman, Iwan Sugihartono, Friday Veronica Florencia, Linggar Jati
Departmen Chemistry of Universitas Negeri Jakarta
Abstract
Research and development of liquid crystal of cholesteryl acrylate growing up now. The aim of this research is to synthesis composites and polymerizations of cholesteryl acrylate with dopan of indium tin oxide (ITO). The blending process of cholesterol acrylate and ITO was performed using casting solution technique at 75C for 30 minutes and at various the concentration of ITO. In this research using variation concentration of ITO and power of lamp for UV curing process. Monomer KA and ITO have succeeded in becoming a composite with photopolymerization process with UV curing method with variation of UV lamp power that is 10, 25, 40 and 55 watt. In functional group analysis with FTIR showed vibration of In-OH bond with C-O at wave number 1056,99 cm-1. FTIR showed a peak at wave number 2929,87 cm-1 for vibration of groups in bond C-H in vinyl, wave number at 2860,01 cm-1 for vibration bond of C-H alyfatic. Spectrum FTIR of ITO at wave number 437,84; 487,99; 534,28; 619,15 cm-1. Peak at 2100 cm-1 has dissepeared in spectrum FTIR of Cholesteryl acrylate which showed molecule of cholesteryl acrylate had polymerized. Conductivity of blending of Cholesteryl acrylate-ITO was determined using by LCR meter. In general conductivity value and permittivity of blended ChoA-ITO increase with the increasing of the concentration of dopan ITO was added to the composites. e value of PKA-ITO composite conductivity has a value greater than the value of KA-ITO conductivity of 4,0783x10-10 S/m.
Keywords: Cholesteryl acrylate, composite, photopolymerization, UV curing, characteristic and conductivity
