Polymer, liquid crystal orientation agent, liquid crystal orientation film and application of liquid crystal orientation film
A technology of polymer and aliphatic ring, which is applied in the field of liquid crystal alignment film and liquid crystal alignment film, polymer, and liquid crystal alignment agent. It can solve the problems of voltage retention and ion density degradation, failure to obtain effects, and influence on display effects. Achieve excellent photoelectric performance, less accumulated charge, and good thermal stability
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[0114] The raw materials used in this embodiment can be obtained through commercially available
[0115] The abbreviations used in the following examples are as follows
[0116] a-1-1: 1,2,3,4-cyclobutane tetracarboxylic dianhydride;
[0117] a-1-2: 3,4-dicarboxy-1,2,3,4-tetrahydro-1-naphthalene succinic dianhydride
[0118] a-2: pyromellitic dianhydride
[0119] b-1-1: 2,4-bis(4-aminoanilino)-6-anilino-1,3,5-triazine, the structural formula is as formula (Ⅴ)
[0120]
[0121] b-1-2: 2-(diphenylamino)-4,6-bis[(3-aminophenyl)amino]-1,3,5-triazine, the structural formula is as formula (VI);
[0122]
[0123] b-1-3: 2-dimethylamino-4,6-bis[(3-aminophenyl)amino]-1,3,5-triazine, the structural formula is as formula (Ⅶ)
[0124]
[0125] b-2-1: p-Phenylenediamine
[0126] b-2-2: 4,4’-diaminodiphenyl ether
[0127] b-2-3: 4,4’-Diaminodiphenylmethane
[0128] b-2-4: 2,4-Diaminohexadecylphenyl ether
[0129] B-1: N-Methylpyrrolidone
[0130] B-2: Butyl cellosolve
[...
preparation example 1
[0134] Put 12.17g (0.1125mol) of diamine raw materials b-2-1 and 4.36g (0.0125mol) of b-2-4 into a nitrogen-protected single-necked bottle, add 250g of B-1 to mix, and then add two Anhydride starting material 19.6 g (0.1 mol) of a-1-1, 7.5 g (0.025 mol) of a-1-2. React at room temperature for 24 hours. Add 49.38 g (0.625 mol) of pyridine and 63.75 g (0.625 mol) of acetic anhydride in sequence and react at room temperature for 24 hours to carry out imidization reaction. Then put the reaction solution into ethanol for precipitation, suction filtration to obtain a white powdery solid, wash the obtained white solid with ethanol, then dissolve the white solid in B-1, then precipitate in ethanol, and suction filtration to make the polyamide The imine is refined, and finally the refined polyimide is vacuum-dried for future use. Dissolve the polyimide solid after vacuum drying first with B-1, and then add B-2 to prepare a solution. The polymer content in the solution is 6wt%, B-1 is...
preparation example 2
[0136] Put 15.38g (0.04mol) of diamine raw materials b-1-1 and 6.49g (0.06mol) of b-2-1 into a three-necked flask with nitrogen protection, add 165g of B-1 and mix, and then 15.01 g (0.05 mol) of a-1-2 and 4.36 g (0.05 mol) of a-2 were added as dianhydride raw materials. React at room temperature for 24 hours. After the reaction is completed, add B-1 and B-2 to prepare a solution. The polymer content in the solution is 6wt%, B-1 is 74wt%, and B-2 is 20wt%. Polyamic acid solution A-2 -1, GPC test molecular weight Mw is 56534g / mol.
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