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Random copolymerization polysulfonamide spinning liquid and preparation method thereof

A polysulfone amide, random copolymerization technology, applied in the direction of spinning solution preparation, single-component copolymerized polyamide artificial filament, filament molding treatment, etc., can solve problems that have not been seen yet, and achieve convenient production and low cost , the effect of conditional optimization

Inactive Publication Date: 2008-08-06
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the current research focuses on the preparation of polysulfoneamide by low-temperature polycondensation or interfacial polycondensation of one or two kinds of diamines and diformyl chloride, focusing on how to control the molecular weight; Related reports on the preparation of random copolymerized polysulfoneamides from amines

Method used

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  • Random copolymerization polysulfonamide spinning liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of polysulfone ether aramid spinning solution

[0026] In a 500 ml four-necked bottle equipped with mechanical stirring and nitrogen inlet, add 200 ml of NMP (N-methyl-2-pyrrolidone) solvent and 1.0 g of lithium chloride, and heat in a water bath at 70°C to completely dissolve lithium chloride . Dissolve while stirring under the protection of nitrogen, followed by 2.34 mmoles of 4,4'-diaminodiphenyl ether, 2.34 mmoles of 4,4'-diaminodiphenylsulfone and 3.12 mmoles of p-phenylenediamine, 7.80 mmoles mol of terephthaloyl chloride, and then reacted at room temperature for 6 hours. The specific reaction process is shown in Figure (1).

[0027] Use CaO to neutralize the polymer reaction solution, adjust the pH value to 6-7, and then filter and defoam, then it can be directly used as spinning solution. At 35° C., the falling ball viscosity of the spinning solution was tested for 50 seconds (the falling ball is a steel ball with a diameter of 3 mm, an...

Embodiment 2

[0029] Embodiment two: the preparation of polysulfone methane aromatic amide spinning solution

[0030] In the 500 milliliter four-necked bottle that is equipped with mechanical stirring and nitrogen inlet, add the NMP (N-methyl-2-pyrrolidone) solvent of 200 milliliters and the lithium chloride of 3.0 grams, 70 ℃ of water baths make lithium chloride dissolve completely, Then dissolve while stirring under nitrogen protection, successively 6 mmoles of 4,4'-diaminodiphenylmethane, 6 mmoles of 4,4'-diaminodiphenylsulfone and 18 mmoles of p-phenylenediamine, 30 Millimoles of terephthaloyl chloride. Then react at normal temperature for 6 hours. The specific reaction process is shown in Figure (1).

[0031] Use CaO to neutralize the polymer reaction solution, adjust the pH value to 6-7, and then filter and defoam, then it can be directly used as spinning solution.

Embodiment 3

[0032] Example 3: Preparation of polysulfone bisphenol A aromatic amide spinning solution

[0033] In a 500 ml four-necked bottle equipped with mechanical stirring and nitrogen inlet, add 200 ml of NMP (N-methyl-2-pyrrolidone) solvent and 4.0 g of calcium chloride, and completely dissolve lithium chloride in a 70° C. water bath. Cool to 0°C with an ice-water bath, add 5.2 ml of pyridine, then dissolve under nitrogen protection while stirring, add 16 mmol of polysulfone bisphenol A aromatic amide, 16 mmol of 4,4'-diaminobis Phenylsulfone and 8 mmoles of p-phenylenediamine, 40 mmoles of terephthaloyl chloride. Then react at normal temperature for 6 hours. The specific reaction process is shown in Figure (1).

[0034] Use CaO to neutralize the polymer reaction solution, adjust the pH value to 6-7, and then filter and defoam, then it can be directly used as spinning solution.

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Abstract

The invention relates to random copolymerization poly-sulfone amide spinning fluid which is composited by three species aromatic diamine and terephthaloyl chloride and a method for preparing the random copolymerization poly-sulfone amide spinning fluid, wherein the spinning fluid takes the N-methyl-2pyrrolidone NMP as the dissolvent, monomer and the mole percent which are adopted by the method are as following: the aromatic diamine 40%-60%, the terephthaloyl chloride 60%-40%, taking the above total monomer 100% as a benchmark, further adding 1.0%-4.0% alkali chloride as the solvent. Since the method takes the manifold aromatic diamine as the monomer of the poly-reaction, which properly damages the regularity of the main chain, however, which has no effect to arrange the original crystal lattice, increasing the flexibility of the chain at various degree, the method is beneficial for orienting and crystallizing of the entire molecular chain and for improving the mechanical property of the material. The method has the advantages of simple technology, condition optimized, high operability, convenient manufacture and low cost.

Description

technical field [0001] The present invention relates to a random copolymerized polysulfoneamide spinning solution and its preparation method, in particular to a random copolymerized polysulfoneamide spinning solution composed of three kinds of aromatic diamines and terephthaloyl chloride and its preparation method . Background technique [0002] As a kind of aromatic polyamide fiber, polysulfoneamide has a thermal decomposition temperature up to 420°C, but its mechanical properties are only similar to those of ordinary fibers, and are quite different from other high-performance fibers. Due to the strong polar sulfone group contained in the molecular structure of polysulfoneamide, although it can improve the flame retardancy and high temperature resistance of the material, it must also greatly reduce the hydrogen bonding between macromolecules, making the fiber orientation Both degree and crystallinity are low, resulting in poor mechanical properties of the fiber. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/80D01D1/02D01D1/10
Inventor 刘丽唐志勇王维涛焦青华李明徐文婷吴亚南马伟
Owner SHANGHAI UNIV
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