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Polyethylene material resistant to electron beam irradiation as well as preparation and application thereof

A technology of electron beam irradiation and polyethylene, which is applied in the field of polyethylene materials, can solve the problems of reduced light transmittance, decreased mechanical properties, and yellow color

Inactive Publication Date: 2019-02-05
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] After the material is irradiated by electron beams, chemical reactions such as degradation or crosslinking will occur, resulting in changes in properties, such as mechanical properties decline, yellow color, and light transmittance also decrease, which seriously affects the application of products.

Method used

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  • Polyethylene material resistant to electron beam irradiation as well as preparation and application thereof
  • Polyethylene material resistant to electron beam irradiation as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] 100 parts by weight of polyethylene (2426H produced by China Petroleum Lanzhou Petrochemical Company) and 5 parts of primary antioxidant 1098 (BASF China Co., Ltd.), 5 parts of auxiliary antioxidant 626 (BASF China Co., Ltd.), 5 parts of light stabilizer 944 (BASF China Co., Ltd.), 5 parts of ultraviolet absorber UV-531 (BASF China Co., Ltd.) and 5 parts of light shielding agent titanium dioxide are blended, and melted and extruded at a temperature of 150°C-200°C through an extruder. The sample is obtained after injection molding by the injection molding machine. The sample has two sizes, namely a dumbbell-shaped sample of 10*4mm and a rectangular sample of 80*10*4mm. Firstly, the sample is irradiated with electron beam, and the irradiation dose is 25kGy, and then the performance test is carried out on the sample.

[0090] The test results of each experiment are shown in Table 1 and Table 2.

Embodiment 2

[0107] Repeat Example 1, except that the 2426H type polyethylene is replaced by the 2420F type polyethylene produced by Daqing Petrochemical.

[0108] The test results of each experiment are shown in Table 1 and Table 2.

Embodiment 3

[0110] Repeat Example 1, the difference is: the main antioxidant 1098 is replaced by the main antioxidant 1010.

[0111] The test results of each experiment are shown in Table 1 and Table 2.

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Abstract

The invention discloses a polyethylene material resistant to electron beam irradiation. The polyethylene material is prepared from the following components: A) 100 parts by weight of polyethylene resin; B) 1-9 parts by weight of a primary antioxidant; C) 1-9 parts by weight of an auxiliary antioxidant; D) 1-9 parts by weight of a hindered amine light stabilizer; E) 2-10 parts by weight of an ultraviolet light absorber; and F) 1-10 parts by weight of a light shielding agent. After the polyethylene material resistant to electron beam irradiation is irradiated by 25 kGy dosage of electron beams,the color change of the polyethylene material before and after irradiation is small, in addition, the mechanical property and the thermal stability can be basically not affected, and the radiation resistance of the material is improved. The invention further relates to preparation and application of the irradiation-resistant polyethylene material. The material can be used as a medical polymer material, such as a medical catheter material.

Description

technical field [0001] The invention relates to a polyethylene material resistant to electron beam irradiation, which belongs to the field of biomedical polymer materials. The invention also relates to the preparation and application of the polyethylene material, which can be used as a polymer material in the medical field. Background technique [0002] Polyethylene (PE) is a crystalline thermoplastic resin obtained by ethylene polymerization. It is of good quality, low price, easy to obtain, and has excellent chemical stability. It is resistant to hydrochloric acid, sodium hydroxide, hydrofluoric acid and other chemical substances at room temperature. Corrosion, so it has a wide range of applications, transportation pipes, cables, wires, containers, bags, etc. can be made of polyethylene materials. Polyethylene is an alkane inert polymer with a small amount of double bonds and ether bonds in the molecule, and its weather resistance is slightly poor. Sunlight or rain will c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/20C08K3/22C08K5/132C08K13/02
CPCC08K2003/2241C08K2201/011C08L23/06C08L2201/08C08K5/20C08K3/22C08K5/132C08K13/02
Inventor 丁雪佳张含李阳刘晓飞王国胜
Owner BEIJING UNIV OF CHEM TECH
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