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Acrylonitrile copolymer, preparation and use thereof

A technology of acrylonitrile and copolymer, applied in the field of acrylonitrile copolymer, can solve problems such as difficulty in ensuring the regularity of product structure, and achieve the effects of good application prospect, high production efficiency and low production cost

Inactive Publication Date: 2008-12-17
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, further studies have found that the structural regularity control technology only uses the method of controlling the concentration of reaction monomers, and it is still difficult to ensure the structural regularity of the product.

Method used

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  • Acrylonitrile copolymer, preparation and use thereof
  • Acrylonitrile copolymer, preparation and use thereof
  • Acrylonitrile copolymer, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053]First, add 2720g of deionized water to the reaction vessel, flush with nitrogen for 60 minutes, and heat to 70°C; then add the chain transfer control agent dodecyl mercaptan and the monomer total amount of 1mmol% in the reaction vessel at one time The reducing agent sodium bisulfite 4.0g of total amount 5mmol%, after stirring for 5 minutes, add the oxidizing agent potassium persulfate 18.6g of monomer total amount 9mol% again; Add 138.64g (85mol%) acrylonitrile single solid and 39.04g (15mol%) of the second monomer methyl acrylate, after the two monomers were fully mixed, they were added dropwise to the polymerization system in the reaction vessel within 2.5 hours, and continued to stir for 30 After 10 minutes, the reaction was completed, and the reaction was carried out for 3 hours in total. Then, the product was filtered, washed with deionized water three times, and vacuum-dried to obtain the acrylonitrile copolymer of the present invention.

[0054] Adopt element anal...

Embodiment 2-5

[0058] The corresponding acrylonitrile-methyl acrylate copolymers were prepared by adopting the polymerization temperatures in Table 1 and keeping the components and processes in Example 1 unchanged.

[0059] Raw material ratio and polymerization temperature of table 1 AN-MA copolymerization

[0060]

[0061] After being tested by the same method as in Example 1, the thermal properties of the obtained copolymers are shown in Table 2.

[0062] Thermal properties of AN / MA copolymers prepared under different reaction temperatures in table 2

[0063]

[0064]

[0065] T in Table 2 g , T m , T d , T c are the peak temperatures of glass transition, melting, thermal decomposition, and crystallization, respectively.

[0066] After being tested by the same method as in Example 1, the sequence lengths of the obtained copolymers are shown in Table 3.

[0067] The sequence distribution of table 3AN / MA copolymer

[0068]

[0069] In Table 3, R is the number of times of s...

Embodiment 6

[0074] The same method as in Example 1 was used to prepare an acrylonitrile-methyl acrylate copolymer. First, add 2190g deionized water to the reaction vessel, flush with nitrogen for 90 minutes, and heat to 40°C; Total amount 3.2mol% reducing agent sodium bisulfite 12.4g, after stirring for 5 minutes, add the oxidizing agent sodium hypochlorite 24.0g of monomer total amount 10.5mmol%; Add the acrylonitrile that formula is 130.40g (80mol%) in mixing container and 52.88g (20mol%) of methyl acrylate, after the two monomers were fully mixed, they were added dropwise to the polymerization system within 3.5 hours. After the monomers were added dropwise and continued to stir for 20 minutes, the reaction ended, and the reaction was carried out for 4 hours ; Then filter the product, wash the product three times with deionized water, and dry it in vacuum to obtain the acrylonitrile copolymer of the present invention.

[0075] Tested by the same method as in Example 1, the ratio of the...

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Abstract

The invention relates to an acrylonitrile copolymer and a preparation method and an application thereof, wherein, the mole ratio of an acrylonitrile on a molecular chain of the acrylonitrile copolymer to a second monomeric unit is 2:1 to 19:1; the formula of the acrylonitrile copolymer is that: 70.0 mol percent to 90.0 mol percent of the acrylonitrile monomer, 10.0 mol percent to 30.0 mol percent of the second monomeric unit, an evocating agent and a chain-transferring control agent respectively taking up 0.1 mol percent to 16.2mol percent and 0.05 mol percent to 5.0mol percent of the total quantity of monomers. The preparation method adopts the formula of the acrylonitrile copolymer and the following technique: a proper amount of deionized water is put in a reaction vessel and cleaned with nitrogen for 5 minutes to 400 minutes at a temperature of 0 DEG C to 70 DEG C; the evocating agent and the chain-transferring control agent are added in one time; the acrylonitrile monomer and the second monomer are put into a blending container, evenly blended and the dropped slowly into the reaction vessel; and then all reactants continue to be stirred for 20minutes to 40 minutes and the product is obtained after being filtered, cleaned with the deionized water for three times and dried in vacuum. The acrylonitrile copolymer of the invention can be produced into acrylic fiber or film with good performance through a fusion processing method.

Description

technical field [0001] The present invention relates to acrylonitrile copolymer technology, in particular to an acrylonitrile copolymer with regular and orderly arrangement of two monomer units on a molecular chain, a preparation method thereof and acrylonitrile copolymer fibers or For the use of thin films, the main international patent classification number is proposed to be Int.Cl.C08F220 / 44(2006.01)I. Background technique [0002] Polyacrylonitrile fiber is one of the most important textile polymer fiber materials, and it is also the most important carbon fiber matrix raw material. Polyacrylonitrile macromolecules have a special structure, and their decomposition temperature (~250°C) (the wavy line indicates approximately) is lower than its melting point (~317°C), and crosslinking and cyclization have occurred without melting during heating. Therefore, the solution spinning process (dry method, wet method and dry-wet method) has been used in industrial production to pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/44C08F2/38C08F4/40D01F6/54D01D5/08C08L33/20C08K5/00C08K3/38B29C49/78B29L7/00
Inventor 张兴祥韩娜于万永王学晨
Owner TIANJIN POLYTECHNIC UNIV
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