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Multi-mixed composite salt monomer and multi-element polybenzodiazole liquid crystal polymer with antioxidant stability and preparation and application of the multi-mixed composite salt monomer and multielement polybenzodiazole liquid crystal polymer

A technology of liquid crystal polymers and polybenzodiazoles, which is applied in the preparation of amino compounds, organic compounds, and aminohydroxyl compounds, etc., which can solve the problems of compounding, lack of light resistance and compression performance and improvement, high price, and decline in mechanical properties And other issues

Pending Publication Date: 2020-12-25
金宁人 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] 2) The lack and improvement of compounding, light resistance and compression performance caused by the molecular structure of PBO itself
However, due to the lack of polar groups in the molecular structure of PBO, the absence of any functional bonds between molecular chains and the very smooth surface of the fiber, its compounding, axial compression, and UV resistance are poor, which greatly limits the direct use of PBO fibers. Applications in the field of advanced composite materials are only suitable for applications where reinforcement is not in direct contact with the environment
If it is used for composite materials (bulletproof armor, insulating materials for rockets and engines, etc.), surface modification treatment is required: there are methods such as acid treatment, coupling agent treatment, plasma treatment and corona treatment to improve the surface viscosity of PBO fibers. Modification technology of junction properties; there are also cross-linking methods with added substances, ceramic coating methods, multi-dimensional PBO materials and single-walled carbon nanotube (SWCNT) polymerization methods to improve the interaction between microfibers to improve the compression resistance of PBO fibers Performance improvement research, but presents negative effects of fiber damage, decline in original mechanical properties, complicated use, and higher price

Method used

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  • Multi-mixed composite salt monomer and multi-element polybenzodiazole liquid crystal polymer with antioxidant stability and preparation and application of the multi-mixed composite salt monomer and multielement polybenzodiazole liquid crystal polymer
  • Multi-mixed composite salt monomer and multi-element polybenzodiazole liquid crystal polymer with antioxidant stability and preparation and application of the multi-mixed composite salt monomer and multielement polybenzodiazole liquid crystal polymer
  • Multi-mixed composite salt monomer and multi-element polybenzodiazole liquid crystal polymer with antioxidant stability and preparation and application of the multi-mixed composite salt monomer and multielement polybenzodiazole liquid crystal polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 4

[0159] Preparation and application of embodiment 1 four mixed compound salt monomer n(DAR / TPA)-and-m(TAB / DHTA)

[0160] (1) Preparation of four-mix compound salt monomer

[0161]

[0162] Add 200g of deoxygenated water, 5.12g of 96% NaOH (0.1229mol) and 6.65g (0.04mol) of terephthalic acid (TPA) and 1.98g (0.01mol) of 2,5-dihydroxyterephthalic acid in the glass reactor (DHTA), stirring and raising the temperature to 50°C until it dissolves into a light brown transparent solution, under the protection of nitrogen, slowly add 8.78g (0.0412mol) of 4,6-diaminoresorcinol hydrochloride (DARH, containing sn 2+ 2646ppm) and 2.93g (0.0103mol) 1,2,4,5-tetraaminobenzene hydrochloride (TABH, Sn 2+ 1060ppm) dissolved in 180g of deoxygenated water, stirred and heated up to 70°C for hot filtration, the wet filter cake was beaten and washed with 180mL of deoxygenated water, filtered at room temperature, and vacuum-dried at 70°C to obtain four monomers of TPA, DAR, DHTA, and TAB (mol rat...

Embodiment 2 4

[0167] Preparation and application of embodiment 2 four-mix compound salt monomer n(DAR / TPA)-and-m(TABP / DHTA)

[0168] (1) Preparation of four-mix compound salt monomer

[0169]

[0170]Add 200g of deoxygenated water, 5.12g of 96% NaOH (0.1229mol) and 6.65g (0.04mol) of terephthalic acid (TPA) and 1.98g (0.01mol) of 2,5-dihydroxyterephthalic acid in the glass reactor (DHTA), stirring and raising the temperature to 50°C until it dissolves into a light brown transparent solution, under the protection of nitrogen, slowly add 8.78g (0.0412mol) of 4,6-diaminoresorcinol hydrochloride (DARH, containing sn 2+ 2646ppm) and 3.71g (0.103mol) of 3,3',4,4'-tetraaminobiphenyl hydrochloride (TABPH) dissolved in 180g of deoxygenated water solution, after adding, stir and heat up to 70°C for hot filtration, wet filtration The cake was beaten and washed with 180 mL of deoxygenated water, filtered at room temperature, and vacuum-dried at 70°C to obtain a 20% dihydroxyl group formed by TPA, ...

Embodiment 3 3

[0175] Example 3 Preparation and Application of Trimix Compound Salt Monomer (DAR)-and-(nTPA / mDHTA)

[0176] (1) Preparation of three mixed compound salt monomers

[0177]

[0178] Add 200g of deoxygenated water, 4.27g of 96% NaOH (0.1025mol) and 8.22g (0.0495mol) of terephthalic acid (TPA) and 0.10g (0.0005mol) of 2,5-dihydroxyterephthalic acid in the glass reactor (DHTA), stirring and raising the temperature to 50°C until it dissolves into a light brown transparent solution, under the protection of nitrogen, slowly add 10.97g (0.0515mol) of 4,6-diaminoresorcinol hydrochloride (DARH, containing sn 2+ 2646ppm) dissolved in 180g deoxygenated water solution, after the addition, stir and heat up to 70°C for hot filtration, the wet filter cake is beaten and washed with 180mL deoxygenated water, filtered at room temperature, and vacuum-dried at 70°C to obtain TPA, DHTA, DAR triple monomer (mol Ratio 0.99:0.01:1.0, n / m=99) formed 1% dihydroxy modified PBO trimix compound salt m...

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Abstract

The invention discloses a multi-mixed composite salt monomer and multi-element polybenzodiazole liquid crystal polymer with antioxidant stability and preparation and application of the multi-mixed composite salt monomer and multielement polybenzodiazole liquid crystal polymer. The structure of the multi-mixed composite salt monomer is shown as a formula I, a formula II or a formula III. The invention further discloses a preparation method of the multi-mixed composite salt monomer, application of the multi-mixed composite salt monomer in preparation of the multi-element polybenzodiazole liquidcrystal polymer and the fiber thereof through self-polycondensation, the multi-element polybenzodiazole liquid crystal polymer obtained according to the multi-element polybenzodiazole liquid crystal polymer and the fiber thereof, and the structure of the multi-element polybenzodiazole liquid crystal polymer is shown as a formula V, VI or VII. The multi-mixed composite salt monomer integrates the structure and potential performance of a material, has excellent oxidation resistance stability, can effectively solve the comprehensive performance of the material when being applied to self-polycondensation preparation of modified PBO composite fibers, and has the advantages of high polymerization speed, unique fiber solidification equipment and process, high productivity, convenience in operation, low cost and the like.

Description

technical field [0001] The invention relates to a class of multi-mixed compound salt monomers and multi-component polybenzodiazole liquid crystal polymers with anti-oxidation stability and their preparation and application, belonging to the technical field of new polymer monomers and high-performance organic fibers. Background technique [0002] Nowadays, poly-p-phenylenebenzobisoxazole (PBO) is the most famous organic high-performance fiber. Its high-strength and high-modulus fiber, heat resistance, flame resistance, softness and impact resistance are the best among organic fibers. The comprehensive properties presented by Zylon-HM fiber (tensile strength of 5.8GPa, modulus of 270GPa, limiting oxygen index of 68 and decomposition temperature of 650°C) have long been used as new materials in the fields of aerospace, national defense and military, and special civilian applications. It has attracted much attention from research departments and industry circles. In foreign cou...

Claims

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Application Information

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IPC IPC(8): C08G73/22C08G73/18D01F6/78C09K19/38C07C211/50C07C209/00C07C215/80C07C213/08C07C65/05C07C63/28C07C51/41
CPCC08G73/22C08G73/18D01F6/78C09K19/3823C07C211/50C07C215/80C07C65/05C07C63/28
Inventor 金宁人金菁
Owner 金宁人
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