Polymerizable compound
A technology of polymeric compounds and optical anisotropy, applied in organic chemistry, nonlinear optics, chemical instruments and methods, etc., can solve problems such as disordered orientation, low solubility of polymeric compounds, improvement of heat resistance or mechanical strength, etc. , to achieve the effect of wide temperature range of liquid crystal phase, excellent solubility and fast curing speed
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Embodiment 1
[0096] Add 12.8g (96mmol) of aluminum (III) chloride and 100ml of dichloromethane into a reaction vessel equipped with a stirring device, a cooler and a thermometer, and stir. Then, 8.4 g (110 mmol) of acetyl chloride was slowly added dropwise over 90 minutes, and then 80 ml of a dichloromethane solution of 20 g (80 mmol) 4-bromo-2-fluorobiphenyl was slowly added dropwise over 2 hours. After the dropwise addition was completed, stirring was continued for 2 hours to complete the reaction. The reaction solution was slowly poured into 500 ml of ice water, extracted with dichloromethane, and the organic layer was washed with pure water and saturated brine. After distilling off the solvent, it was dried to obtain 23 g of an acetyl group-introduced compound. Then, 23 g of an acetyl group-introducing compound and 300 ml of formic acid were put into a reaction vessel with a stirring device, a cooler, and a thermometer, and 20 ml of 34.5% hydrogen peroxide was added, and heated to ref...
Embodiment 2
[0111] Add 30 g (120 mmol) of 4-bromo-2-fluorobiphenyl and 120 ml of dichloromethane into a reaction vessel equipped with a stirring device, a cooler and a thermometer, and stir. The reaction vessel was cooled to 0° C., 18 g of aluminum(III) chloride was added, and 17 g of oxalyl chloride was slowly added dropwise within 30 minutes.
[0112] After the dropwise addition, the reaction container was returned to room temperature, stirred for 2 hours, and the reaction was terminated. The reaction solution was slowly poured into 500 ml of ice water, extracted with dichloromethane, and the organic layer was dried over sodium sulfate. After distilling off the solvent, the reactant was dissolved in 200 ml of toluene, 7 ml of ethanol was added, and the reaction container was cooled to 0°C. Then, 15 g (150 mmol) of triethylamine was slowly added dropwise. After the dropwise addition, the reaction container was returned to room temperature, stirred for 2 hours, and the reaction was term...
Embodiment 3
[0126] A polymerizable liquid crystal composition (composition 1) having the composition shown below was prepared.
[0127]
[0128] The polymerizable liquid crystal composition has good compatibility stability and exhibits a nematic liquid crystal phase. To this composition, 3% of a photopolymerization initiator Irgacure-907 (IRGACURE-907) (manufactured by Ciba Specialty Chemicals Co., Ltd.) was added to prepare a polymerizable liquid crystal composition (composition 2). The cyclohexanone solution of this composition 2 was spin-coated on glass with polyimide, and irradiated with 4 mW / cm using a high-pressure mercury lamp 2 UV rays for 120 seconds were used to polymerize Composition 2 while maintaining a uniform orientation state to obtain an optically anisotropic body. The surface hardness (according to JIS-S-K-5400) of this optically anisotropic body was H. When the phase difference before heating of the obtained optical anisotropic body was 100%, the phase difference a...
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