Method for improving water absorption of MC nylon through irradiation crosslinking

A water-absorbent, nylon-based technology, applied in the field of engineering plastic modification, can solve the problems of nylon wheel stress deformation instability, reduce the water absorption of nylon 6, etc., and achieve the effect of improving water absorption

Pending Publication Date: 2021-01-05
扬州倍尔特新材料有限公司
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for improving the water absorption of MC nylon by irradiation crosslinking, which has the advantage of reducing the water absorption of nylon 6, and solves the problem that nylon 6 is easy to absorb water, and nylon wheels will suffer from damage in hot and humid environments. The problem of force deformation and instability

Method used

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  • Method for improving water absorption of MC nylon through irradiation crosslinking

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Embodiment 1

[0019] see figure 1 , the invention provides a method for improving the water absorption of MC nylon by irradiation crosslinking, comprising the following steps:

[0020] S1. First prepare nylon 6 products with one-dimensional size less than 1000mm and Co 60 Irradiation device, with Co 60 The high-energy irradiation of the irradiation device serves as the initiation energy of the cross-linking reaction;

[0021] S2. Put nylon 6 products with one-dimensional size less than 1000mm into Co 60 The irradiation device is used for irradiation, and the surface of the product faces the ray source, Co 60 The irradiation dose rate of the irradiation device is 5kGy / h, and the irradiation time is 100h. co 60 The irradiation of the irradiation device triggers the cross-linking reaction between the polymer molecular chains of the nylon 6 material, transforms the amide structure that is easy to absorb water into a hydrophobic imide structure, and reduces the water absorption of nylon 6. ...

Embodiment 2

[0024] see figure 1 , the invention provides a method for improving the water absorption of MC nylon by irradiation crosslinking, comprising the following steps:

[0025] S1. First prepare nylon 6 products with one-dimensional size less than 1000mm and Co 60 Irradiation device, with Co 60 The high-energy irradiation of the irradiation device serves as the initiation energy of the cross-linking reaction;

[0026] S2. Put nylon 6 products with one-dimensional size less than 1000mm into Co 60 The irradiation device is used for irradiation, and the surface of the product faces the ray source, Co 60 The irradiation dose rate of the irradiation device is 8kGy / h, and the irradiation time is 12.5h. co 60 The irradiation of the irradiation device triggers the cross-linking reaction between the polymer molecular chains of the nylon 6 material, transforms the amide structure that is easy to absorb water into a hydrophobic imide structure, and reduces the water absorption of nylon 6....

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Abstract

The invention discloses a method for improving water absorption of MC nylon through irradiation crosslinking, which comprises the following steps: S1, preparing a nylon 6 material and a Co60 irradiation device, and taking high-energy irradiation of the Co60 irradiation device as initiation energy of crosslinking reaction; and S2, putting the nylon 6 material into the Co60 irradiation device for irradiation, initiating a cross-linking reaction between polymer molecular chains of the nylon 6 material by irradiation of the Co60 irradiation device, and converting an amide structure which is easy to absorb water into a hydrophobic imide structure so as to reduce the water absorption of the nylon 6. According to the invention, gamma-ray irradiation of the Co60 irradiation device is utilized to initiate a cross-linking reaction between polyamide molecular chains on the surface layer of the nylon wheel, an amide structure easy to absorb water is converted into a hydrophobic imide structure, the water absorption of nylon 6 is reduced, the plasticizing effect of water on nylon 6 is reduced, the stability of the use performance of nylon 6 in a humid and hot environment is improved, and the process has the advantages of simple and feasible process, no by-product, no pollution, batch treatment and the like.

Description

technical field [0001] The invention relates to the technical field of modification of engineering plastics, in particular to a method for improving the water absorption of MC nylon through irradiation crosslinking. Background technique [0002] The linear polyamide obtained by the anionic ring-opening polymerization of caprolactam, commonly known as nylon 6, is an important engineering plastic, and the amide structure in the polyamide molecular chain structure has greater hydrophilicity. Nylon 6 is easy to absorb water, and water is resistant to nylon. 6 It has a plasticizing effect, and the water-absorbing nylon wheel will be deformed and unstable in a humid and hot environment. Therefore, it is necessary to modify the hydrophobicity of nylon 6 to reduce its water absorption and improve the stability of its performance in hot and humid environments. [0003] Irradiation cross-linking technology refers to the bombardment of insulating polymer materials by high-energy parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08J3/24C08L77/02
CPCC08J3/28C08J3/24C08J2377/02
Inventor 张春红张爱臣张亮凌凌
Owner 扬州倍尔特新材料有限公司
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