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Multi-component copolyamide containing side group and preparation method and application thereof

A multi-component copolymerized aramid and side group technology, applied in the field of polyamide, can solve the problems of decreased mechanical properties, decreased fiber strength and modulus, and cannot improve the solubility of PPTA.

Active Publication Date: 2019-01-04
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Teijin Corporation of Japan has also developed a copolyamide with a ratio of para-position: meta-position content of about 2, and carried out wet spinning. Although the fiber elongation has increased by 1.5 times, the strength and modulus of the fiber have respectively decreased by 50%. , and its mechanical properties decrease significantly
[0018] European patent EP 315253 reported that AKZO N.V. company used 1,4-diamino-9,10-anthracenedione and 4,4'-biphenyldiamine as the third monomer copolyamide, and then copolyamide with PPTA respectively Spinning after blending, the fiber strength and elongation are both increased by 10% compared with PPTA, but the introduction of rigid structure can improve the mechanical properties of the copolymerized fiber, but it cannot improve the solubility of PPTA

Method used

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  • Multi-component copolyamide containing side group and preparation method and application thereof
  • Multi-component copolyamide containing side group and preparation method and application thereof
  • Multi-component copolyamide containing side group and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Embodiment 1 Synthetic formula (I) contains the multi-component copolymerized aromatic amide of triazine class side group

[0100] Prepared by low temperature polycondensation method.

[0101] Mix 0.3 mmol of terephthaloyl chloride, 1.0 mmol of p-phenylenediamine and 0.7 mmol of 2-(2,5-diformylchlorophenyl)-4,6-diphenyl-s-triazine in 5 mL of NMP-LiCl (LiCl The mass concentration is 4%), stirred in ice bath for 0.5 hours, then removed the ice bath, and continued to react at 15°C for 0.5 hours. The reaction solution was poured into 200 mL of methanol, and washed with 200 mL of 100° C. hot water to obtain a white precipitate.

[0102] The polymer was characterized by GPC, and a single peak was obtained, indicating that the polymerization was carried out very efficiently, with a number average molecular weight of 62,000 and a dispersion of 1.87. The polymer has very good solubility properties and can be dissolved in organic solvents such as NMP, DMSO, DMAc, NMP-LiCl or DM...

Embodiment 2

[0103] Embodiment 2 Synthetic formula (I) contains the multi-component copolymerized aromatic amide of triazine class side group

[0104] Prepared by low temperature polycondensation method.

[0105] Mix 0.5 mmol of terephthaloyl chloride, 1.0 mmol of p-phenylenediamine and 0.5 mmol of 2-(2,5-diformylchlorophenyl)-4,6-diphenyl-s-triazine in 5 mL of NMP-LiCl (LiCl The mass concentration is 4%), stirred in an ice bath for 0.5 hours, then removed the ice bath, and continued to react at 40° C. for 4 hours. The reaction solution was poured into 200 mL of methanol, and washed with 200 mL of 100° C. hot water to obtain a white precipitate.

[0106] The polymer was characterized by GPC, and a single peak was obtained, indicating that the polymerization was carried out very efficiently, with a number average molecular weight of 79,000 and a dispersion of 1.65. The polymer has very good solubility properties and can be dissolved in organic solvents such as NMP, DMSO, DMAc, NMP-LiCl or...

Embodiment 3

[0107] Embodiment 3 Synthetic formula (I) contains the multi-component polyarylamide of triazine class side group

[0108] Prepared by low temperature polycondensation method.

[0109] Mix 0.8 mmol of terephthaloyl chloride, 1.0 mmol of p-phenylenediamine and 0.2 mmol of 2-(2,5-diformylchlorophenyl)-4,6-diphenyl-s-triazine in 5 mL of NMP-LiCl (LiCl The mass concentration is 4%), stirred in ice bath for 0.5 hour, then removed the ice bath, and continued to react in 60°C oil bath for 48 hours. The reaction solution was poured into 200 mL of methanol, and washed with 200 mL of 100° C. hot water to obtain a flocculent white precipitate.

[0110] The polymer was characterized by GPC, and a single peak was obtained, indicating that the polymerization was carried out very efficiently, with a number average molecular weight of 81,000 and a dispersion of 1.77. The 5% thermal weight loss temperature of the polymer in nitrogen and air is very high, and it has very good thermal stabilit...

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Abstract

The invention discloses multi-component copolyamide containing a side group and a preparation method and application thereof. The side group can be a triazines side group or a triphenylamine side group; the multi-component copolyamide containing the side group has excellent performance; the regularity of the molecular chain is effectively reduced, the crystallinity of the copolyamide is reduced, and accordingly, the solubility of the polymer is greatly improved. The polymer can be dissolved in NMP, DMSO, DMAc, NMP-LiCl, DMF-LiCl and other organic solvents, and solution processing can be conducted. The mechanical property of the thin film prepared from the polymer is excellent, and the thin film is expected to be applicable to the field of high-strength materials. The polymer is high in transparency, has fluorescence, and is expected to be applicable to the field of optical materials. The preparation method is simple and mild in condition, convenience is brought to purification, the monomer can be directly purchased, the price is low, and industrialization is facilitated. The modified multi-component copolyamide can be used in the field of textiles, the military field of ballistic helmets and the traffic field of tires.

Description

technical field [0001] The invention belongs to the technical field of polyamides, and in particular relates to a multi-component copolymerized aromatic amide containing side groups, a preparation method and application thereof. Background technique [0002] Polyamide is a general term for polymers containing amide groups in the repeating unit of the macromolecular main chain. Polyamides can be prepared by ring-opening polymerization of lactams, or by polycondensation of dibasic amines and dibasic acids. Polyamide has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, and has a low coefficient of friction, has a certain flame retardancy, is easy to process, and is suitable for glass fiber And other fillers to enhance the modification to improve performance and expand the scope of application. According to the different comonomers, polyamides can be divided into polyarylamides and aliph...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08G69/32C08G69/28D01F6/80C08J5/18
CPCC08G69/265C08G69/28C08G69/32C08J5/18C08J2377/10D01F6/805
Inventor 周胜张小莉沈志豪赵宁范星河周其凤徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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