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Semi-aromatic polyamide resin prepared through graphene in-situ polymerization and preparation method thereof

A semi-aromatic polyamide and aromatic polyamide salt technology, which is applied in the field of polymer materials, can solve the problems of no modification of semi-aromatic polyamide, poor bonding between additives and substrates, uneven dispersion of additives, etc., and achieve improved Effects of combining chemical forces, improving electrical properties, and improving mechanical properties

Active Publication Date: 2015-02-25
JUNMA TIRE CORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Semi-aromatic polyamides have excellent heat resistance and are widely used in the electrical, electronic and automotive industries. In order to expand more application fields, more additives such as electrical conductivity, thermal conductivity and reinforcement are generally obtained by adding additives to pure resins. function, but the problem with this method is that it is easy to produce uneven dispersion of additives during mixing, and most of them are physical blending, and the bonding force between additives and matrix is ​​poor
However, the prior art does not involve the modification of semi-aromatic polyamides and fails to achieve continuous, high-yield preparation

Method used

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  • Semi-aromatic polyamide resin prepared through graphene in-situ polymerization and preparation method thereof

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Experimental program
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Effect test

Embodiment 1）

[0022] Terephthalic acid: isophthalic acid: hexamethylenediamine is added in the reaction kettle according to 0.7:0.3:1 molar ratio reaction prepared salt solution 5000g, graphene oxide aqueous solution 60g, benzoic acid 5g, sodium phosphate 5g, through After reacting for 2.5 hours at a temperature of 230°C and a pressure of 1.8MPa, and for 0.5 hours at a temperature of 250°C and a pressure of -0.04MPa, the extruded product was cast, drawn, cooled and pelletized to obtain a reinforced and toughened semi-aromatic polyamide. Yield 98%, tensile strength 128MPa, bending strength 268MPa, notched impact strength 60KJ / m 2 .

Embodiment 2）

[0024] Add 8000g of salt solution, 110g of graphene oxide aqueous solution, 8g of adipic acid, and 7g of sodium hypophosphite into the reaction kettle prepared by mixing hexamethylenediamine terephthalate:caprolactam in a molar ratio of 0.7:0.3, and the temperature is 250°C , reacted for 3 hours at a pressure of 2.0MPa, and reacted for 0.7 hours at a temperature of 270°C and a pressure of -0.05MPa. The extruded product was cast, pulled, cooled, and dried to obtain a reinforced and toughened semi-aromatic polyamide with a yield of 97.5 %, tensile strength 123MPa, bending strength 260MPa, notched impact strength 68KJ / m 2 .

Embodiment 3）

[0026] Add 9000 g of salt solution, 415 g of graphene oxide aqueous solution, 10 g of benzoic acid, and 8 g of sodium hypophosphite into the reaction kettle in which hexamethylenediamine terephthalate: hexamethylene adipate is mixed according to the molar ratio of 0.5:0.5. After 2 hours of reaction at a temperature of 270°C and a pressure of 2.2MPa, and 1 hour of reaction at a temperature of 280°C and a pressure of -0.03MPa, the extruded product is cast, drawn, cooled and pelletized to obtain a reinforced and toughened semi-aromatic polyamide , yield 98.4%, tensile strength 118MPa, bending strength 255MPa, notched impact strength 74KJ / m 2 .

[0027] Attached table: Data comparison before and after resin performance modification

[0028]

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Abstract

The invention relates to a semi-aromatic polyamide resin prepared through graphene in-situ polymerization and a preparation method thereof. The resin comprises the following components in parts by weight: 5000 to 10000 parts of semi-aromatic polyamide salt solution, 50 to 500 parts of oxidized graphene water solution, and 7 to 15 parts of auxiliary agent. In the preparation method, the graphene is oxidized before the graphene is added during the polymerization of semi-aromatic polyamide, thus the dispersibility of graphene is improved, moreover the binding chemical force between the graphene and a matrix is improved, and a product with a better performance can be produced. Oxidized graphene is added, the mechanical property of semi-aromatic polyamide material is improved, furthermore the electric performance and heat conductive performance of the semi-aromatic polyamide material are also improved, the cost-performance ratio of the semi-aromatic polyamide material is high, the yield is as high as 98.4%, and continuous production can be achieved.

Description

technical field [0001] The invention relates to a method for preparing semi-aromatic polyamide resin reinforced by in-situ polymerization of graphene, which belongs to the technical field of polymer materials. Background technique [0002] Semi-aromatic polyamides have excellent heat resistance and are widely used in the electrical, electronic and automotive industries. In order to expand more application fields, more additives such as electrical conductivity, thermal conductivity and reinforcement are generally obtained by adding additives to pure resins. function, but the problem of this method is that it is easy to produce uneven dispersion of additives during mixing, and most of them are physical blending, and the bonding force between additives and matrix is ​​poor. [0003] Graphene, as a two-dimensional carbon crystal discovered in recent years, has outstanding and excellent mechanical properties, thermal conductivity and electrical properties. Its structure is also v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K9/00C08K3/04C08G69/26C08G69/28C08G69/36
CPCC08G69/265C08G69/28C08G69/36C08K3/04C08K9/00C08L77/06
Inventor 方乃照王洪斌顾晓华支敏飞宋庙东坎伟涛曹双根韩冰
Owner JUNMA TIRE CORD