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Self-reinforced and toughened polyamide material and preparation method thereof

A technology for toughening polyamide and polyamide, which is applied in the field of self-reinforcing and toughening polyamide materials and their preparation, and can solve the problems of difficult implementation and complicated process.

Active Publication Date: 2021-09-03
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

However, there are some shortcomings in these three methods: for example, it is difficult for these methods to achieve the purpose of both toughening and strengthening the material at the same time, often at the expense of one of the properties
However, this method belongs to processing modification, involves large-scale processing equipment and process conditions, and its process is complicated and difficult to implement.

Method used

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  • Self-reinforced and toughened polyamide material and preparation method thereof
  • Self-reinforced and toughened polyamide material and preparation method thereof
  • Self-reinforced and toughened polyamide material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this example, the self-reinforced toughened polyamide material was prepared by the following method:

[0052] (1) Dry the PA1012 pellets in a vacuum oven at a temperature of 105°C for 10 hours to obtain anhydrous PA1012 raw materials, and the melting point of PA1012 is 190°C;

[0053] (2) Put the anhydrous PA1012 obtained in step (1) into a heat treatment environment, repeatedly discharge the remaining air in the heat treatment environment before heating up, and heat up to 210°C for 3 hours under the condition of continuous high-purity helium gas , to obtain the product.

[0054] The heat-treated product was dissolved in hexafluoroisopropanol, and the solvent was added at a concentration of 10 mg / ml. It was found that part of the material was insoluble and formed a gel.

[0055] The PA1012 product that present embodiment obtains after heat treatment is carried out heat stability test, and its thermal decomposition temperature (T 95 ) is 398 ° C, compared with PA101...

Embodiment 2

[0057] In this example, the self-reinforced toughened polyamide material was prepared by the following method:

[0058] (1) Dry the PA1212 pellets in a vacuum oven at a temperature of 70°C for 12 hours to obtain anhydrous PA1212 raw materials, and the melting point of PA1212 is 180°C;

[0059] (2) Put the anhydrous PA1212 obtained in step (1) into a heat treatment environment, repeatedly discharge the remaining air in the heat treatment environment before heating up, and heat up to 200°C for 6 hours under the condition of high-purity nitrogen, get the product.

[0060] The heat-treated product was dissolved with concentrated sulfuric acid, and the solvent was added at a concentration of 5 mg / ml. It was found that some materials were insoluble and formed a gel. The dissolved photos and DSC data can help explain.

[0061] The PA1212 product that present embodiment obtains after heat treatment is carried out heat stability test, and its thermal decomposition temperature (T 95 )...

Embodiment 3

[0063] In this example, the self-reinforced toughened polyamide material was prepared by the following method:

[0064] (1) Dry the PA66 pellets in a vacuum oven at a temperature of 100°C for 5 hours to obtain anhydrous PA66 raw materials, and the melting point of PA66 is 260°C;

[0065] (2) Put the anhydrous PA66 obtained in step (1) into a heat treatment environment, repeatedly discharge the remaining air in the heat treatment environment before heating up, and heat up to 265°C for 10 hours under constant vacuum conditions to obtain the product .

[0066] The heat-treated product was dissolved with trifluoroacetic acid, and the solvent was added at a concentration of 0.5 mg / ml. It was found that some materials were insoluble and formed a gel.

[0067] The PA66 product that present embodiment obtains after heat treatment is carried out thermal stability test, and its thermal decomposition temperature (T 95 ) is 414 ° C, compared with PA66 without heat treatment, it has incr...

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Abstract

The invention discloses a self-reinforced and toughened polyamide material and a preparation method thereof. A cross-linked gel network structure exists in the polyamide material, and the cross-linked gel network is formed by heat treatment of a polyamide raw material; and the polyamide raw materials comprise a high polymer with a molecular main chain containing an amide group repetitive unit, polyamide with a monomer being omega-amino acid and polyamide formed by polycondensation of a bifunctional monomer. According to the technical scheme, the polyamide raw material is treated in a heat treatment mode, so that a cross-linked gel structure capable of reinforcing and toughening the material is generated in the polyamide raw material, and the heat resistance of the material is improved. The provided preparation method is simple in process, environment-friendly and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of polyamide materials, and in particular relates to a self-reinforcing and toughening polyamide material and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, is a general term for a class of high polymers containing amide groups (-CONH-) in the repeating units on the main chain of the molecule. Polyamide can be obtained by ring-opening polymerization of lactam, or by condensation polymerization of diamine and dibasic acid. Due to its excellent performance and wide applicability, polyamide materials have developed very rapidly. So far, polyamide has become the most used variety among the five major engineering plastics. Whether it is in the basic research of polyamide or its application development, polyamide materials have always occupied an important position in the large family of polymer materials. [0003] The toughening and strengthening of polymers has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L77/06C08K7/14C08K3/04C08K3/34
CPCC08J3/247C08J3/246C08J2377/06C08J2477/06C08K7/14C08K3/041C08K3/346
Inventor 董侠李璇赵莹刘学新王笃金
Owner INST OF CHEM CHINESE ACAD OF SCI
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