PA4-66 copolymer material and preparation method thereof

A technology of copolymerization and hexamethylenediamine adipate, which is applied in the field of polymer materials, can solve the problems of poor comprehensive performance of polyamide materials, and achieve the effects of uniform performance, strong chemical bonding and good performance

Inactive Publication Date: 2021-07-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the defects of poor comprehensive performance of polyamide materials existing in the above-mentioned prior art, the present invention provides a PA4-66 copolymer material and its preparation method

Method used

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  • PA4-66 copolymer material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0055] Liquid butyrolactam is mixed with 80% hexamethylenediamine adipate aqueous solution, the molar ratio of butyrolactam to hexamethylenediamine adipate is 9:1, under the condition of 240-250℃ and nitrogen protection Stir continuously in the reactor, and after reacting for 1 hour, turn on the vacuum pump to remove the excess water vapor escaping from the reactants, and keep the pressure of the reactor system constant at slight negative pressure or normal pressure, generally -0.1MPa~0.1MPa is suitable , After continuing the reaction for 10 hours, a PA4-66 copolymer was obtained. After testing, its tensile strength is 120MPa, and its elongation at break is 110%.

Embodiment 2

[0057] Liquid butyrolactam and 80% hexamethylenediamine adipate aqueous solution are mixed in a closed reactor with a molar ratio of 8:2, and the total mass ratio of butyrolactam and hexamethylenediamine adipate is added simultaneously. 0.6% N-ethyl o-toluene sulfonamide, o-p-toluene sulfonamide, under the conditions of 245-260 ℃ and nitrogen protection, keep stirring in the reactor, after 2 hours of reaction, turn on the vacuum pump to pump out the water vapor in the reactor In addition, the pressure of -0.1MPa-0.1MPa is maintained in the reactor, and the PA4-66 copolymer is obtained after 12 hours of reaction. After the copolymer is extruded and cooled, pelletized, hot water extracted and dried with hot nitrogen, PA4-66 is obtained. 66 copolymer slices, the relative viscosity of the copolymer is 2.4-2.7, the tensile strength is 110MPa after testing, and the elongation at break is 160%.

Embodiment 3

[0059] Liquid butyrolactam and 80% hexamethylenediamine adipate aqueous solution are mixed in a closed reactor with a molar ratio of 8:2, and the total mass ratio of butyrolactam and hexamethylenediamine adipate is added simultaneously. 0.3% terephthalic acid, and 0.4% stearic acid, polyethylene wax, under the condition of 245-260 ℃, nitrogen protection, keep stirring in a closed reactor, after 2 hours of reaction, turn on the vacuum pump to remove the water in the reactor The steam is extracted, and the pressure of -0.1MPa-0.1MPa is maintained in the reactor. After 12 hours of reaction, the PA4-66 copolymer is obtained. After extrusion cooling, pelletizing, hot water extraction and hot nitrogen drying, the copolymer is obtained. PA4-66 copolymer chips, the tensile strength of this copolymer is 115MPa, and the elongation at break is 130%.

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Abstract

The invention belongs to the field of high polymer materials, and discloses a PA4-66 copolymer material and a preparation method thereof. The PA4-66 copolymer material is prepared by copolymerization of a PA4 monomer butyrolactam and a PA66 monomer hexamethylenediamine adipate, and the molar ratio of the butyrolactam to the hexamethylenediamine adipate is (10: 1)-(5: 5). Compared with the prior art, the PA4-66 copolymer material is prepared by copolymerizing the PA4 monomer butyrolactam as a main component and the PA66 monomer hexamethylene adipamide salt, and the material not only has good biodegradability, hydrophilicity and mechanical strength of PA4, but also has greatly improved heat resistance, and can realize melt processing and application in the fields of spinning, engineering plastics and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a PA4-66 copolymer material and a preparation method thereof. Background technique [0002] Polyamide (PA) is an important raw material for engineering plastics and fiber products. Polyamides can be prepared by passing an aqueous solution of a diamine-dicarboxylate continuously at superatmospheric pressure through a continuous reaction zone to which a concentrated aqueous solution of the amide-forming reactants is continuously supplied, in which the controlled temperature-pressure conditions and convert the major part of the salt into polymer. [0003] Polyamide 66 (PA66) is a widely used polymer, also known as nylon 6,6, which is a common engineering plastic. The molecular structure of PA66 includes based on hexamethylenediamine and adipic acid: [NH-(CH 2 ) 6 -NH-CO-(CH 2 ) 4 -CO] n of repeating units, where n is the degree of polymerization (number of repeating units). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/36C08G69/04
CPCC08G69/36C08G69/04
Inventor 赵黎明刘佳张冉张雅敬
Owner EAST CHINA UNIV OF SCI & TECH
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