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Triazine ring based polymers for photoinduced liquid crystal alignment

A triazine ring-based, liquid crystal alignment technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as contact SiO deposition

Inactive Publication Date: 2006-09-13
LG CABLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention relates to a non-contact liquid crystal alignment method using light irradiation, which can align liquid crystals into multiple domains, thereby solving the problems of the traditional contact-type rubbing method and traditional contact-type SiO deposition

Method used

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  • Triazine ring based polymers for photoinduced liquid crystal alignment
  • Triazine ring based polymers for photoinduced liquid crystal alignment
  • Triazine ring based polymers for photoinduced liquid crystal alignment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0023] In a first embodiment, the general formula of the polymer is shown in Chemical Formula 1.

[0024] chemical formula 1

[0025]

[0026] In Chemical Formula 1, m+n=1, and m and n are real numbers of 0˜1, respectively.

[0027] In chemical formula 1, R 1 is one selected from 1a-4a in the following chemical formula 2.

[0028] chemical formula 2

[0029]

[0030] In 1a of Chemical Formula 2, X is one selected from Chemical Formula 3 below.

[0031] —((CH 2 ) n O) m — —O((CH 2 ) n O) m —

[0032]

[0033] In the above chemical formula 3, m and n are integers from 0 to 10 respectively;

[0034] In addition, in 1a of Chemical Formula 2, Y is one selected from Chemical Formula 4 below.

[0035] chemical formula 4

[0036]

[0037] In the above Chemical Formula 4, Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, and Y9 are each selected from one of the following Chemical Formula 5.

[0038] chemical formula 5

[0039] —A —(CA 2 ) n CA 3 —O(CA 2 ) n CA ...

Embodiment 1-1

[0092] Polyamide polymers with cinnamate chromophores for photoinduced liquid crystal alignment

[0093] (1) reforming triazabenzene ring

[0094] 27.1 g of 4(2-tetrahydropyranylmethoxy)bromobenzene was dissolved in 250 ml of anhydrous tetrahydrofuran in a three-necked flask filled with nitrogen, followed by stirring for 24 hours after charging 3 g of magnesium. The solution was reacted at -20° C. for 12 hours in a three-necked flask filled with nitrogen, and at the same time, 18.4 g of cyanuric chloride was slowly added dropwise to 200 ml of anhydrous tetrahydrofuran.

[0095] After the reaction, the reaction solution was removed from tetrahydrofuran under reduced pressure at room temperature, and then dissolved in ethyl acetate. After the solution was mixed with a base solution and vigorously stirred to extract impurities, ethyl acetate was then removed from the solution under reduced pressure at room temperature.

[0096] The solid phase material remaining after solvent r...

Embodiment 1-2

[0113] A polyamide polymer with a chalcone chromophore for light-induced liquid crystal alignment

[0114] (1) Synthesis of chalcone functional groups

[0115] 10 g of methoxychalcone and 2.05 g of sodium cyanide were dissolved in 100 ml of dimethyl sulfoxide, followed by reaction for 24 hours. After the reaction, the reaction solution was mixed with chloroform and stirred with distilled water to extract impurities. After removing the solution phase, the solution was depressurized at room temperature to remove chloroform. After recrystallizing the remaining solid phase in methanol, the solution was vacuum-dried, thus obtaining 4-hydroxychalcone for photoreaction.

[0116] (2) The hydroxyl functional group is introduced into the triazine ring

[0117] 23.8 g of 4-hydroxychalcone obtained by the method of (1) of Example 1-2 was added to a round bottom flask filled with nitrogen and then dissolved in 240 ml of anhydrous tetrahydrofuran. 2.4 g of sodium hydride (NaH) was added...

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Abstract

The tripyridine ring polymer for photoinducing liquid crystal orientation has photoactive radical, such as cinnamate, coumarin, chalcone and maleimide, for inducing, strengthening, improving and maintaining liquid crystal orientation introduced as side chain so as to have at least one photoactive radical. The photoactive radical can produce Fries rearrangement for inducing liquid crystal orientation and can produce light dimerization, photoisomerization, light cross-linking or light degradation to other radicals to strengthen, alter or maintain the produced orientation.

Description

[0001] This application was submitted by the applicant on November 11, 2002. The application number is 02803167.9 (the international application number is PCT / KR02 / 02101). A divisional application for a liquid crystal alignment layer containing the polymer, a liquid crystal element using the alignment layer and its manufacturing method". technical field [0002] The present invention relates to a triazine ring-based polymer for photoinduced liquid crystal alignment and a liquid crystal alignment layer containing the polymer, more specifically, to a polymeric polymer having at least one photoactive chromophore for photoinduced liquid crystal alignment A substance in which a side chain with a photoactive group that induces liquid crystal alignment and enhances, enhances and protects liquid crystal alignment is introduced into the polymer main chain, and also relates to a liquid crystal layer using the polymer. Background technique [0003] Polymers for light-induced liquid cry...

Claims

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Application Information

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IPC IPC(8): C09K19/38G02F1/13
Inventor 申东天金珍栗朴奎淳金泰珉
Owner LG CABLE INC
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