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Preparation method of ultraviolet radiation modified high-density polyethylene

A high-density polyethylene and irradiation technology, which is applied in the field of preparation of UV-irradiated modified high-density polyethylene, can solve the problems of gel generation and long irradiation time, and achieves improved efficiency, shortened UV irradiation time, The effect of broad implementation prospects and application value

Inactive Publication Date: 2008-02-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but in air or O 2 UV radiation modification in the atmosphere has disadvantages such as long irradiation time and gel (HDPE)

Method used

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  • Preparation method of ultraviolet radiation modified high-density polyethylene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for ultraviolet radiation modified HDPE of the present invention, it comprises the following steps:

[0019] 1. Put the container containing HDPE into the ultraviolet irradiation device, and adjust the ambient temperature to 40°C.

[0020] 2. Introduce ozone into the HDPE container, turn on the UV lamp for 10 minutes at the same time, and then turn off the ozone and UV lamp.

[0021] 3. Take out the container and pour out the HDPE in it to obtain UV-irradiated modified HDPE.

Embodiment 2

[0023] Another method of ultraviolet radiation modified HDPE of the present invention, it comprises the following steps:

[0024] 1. Put the container containing HDPE into the ultraviolet irradiation device, and adjust the ambient temperature to 40°C.

[0025] 2. Pass ozone into the container with HDPE, turn on the UV lamp for 15 minutes at the same time, and then turn off the ozone and UV lamp.

[0026] 3. Take out the container and pour out the HDPE in it to obtain UV-irradiated modified HDPE.

Embodiment 3

[0028] Another method of ultraviolet radiation modified HDPE of the present invention, it comprises the following steps:

[0029] 1. Put the container containing HDPE into the ultraviolet irradiation device, and adjust the ambient temperature to 60°C.

[0030] 2. Pass ozone into the container with HDPE, turn on the UV lamp for 10 minutes at the same time, and then turn off the ozone and UV lamp.

[0031] 3. Take out the container and pour out the HDPE in it to obtain UV-irradiated modified HDPE.

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Abstract

The invention discloses the preparation method of ultraviolet radiation modified high-density polyethylene, which comprises irradiating high-density polyethylene with ultraviolet rays in ozone atmosphere at the temperature of 40-60 deg. C, introducing oxygen-containing radicals such as C=0, C-0 and C(=)0 onto its molecular chain. The disclosed process produces no gel, and can substantially reduce the ultraviolet exposure time and increase modifying efficiency.

Description

1. Technical field [0001] The invention relates to a method for modifying polymer materials, in particular to a method for preparing high-density polyethylene (HDPE) modified by ultraviolet radiation in an ozone atmosphere and at different ambient temperatures. 2. Background technology [0002] Synthetic resin with polyolefin as the main body has formed four basic materials together with steel, cement and wood, and plays an extremely important role in human life and social development. According to reports, in 2003 my country's polyolefin (PE, PP) production capacity reached 109.9 million tons, and the output reached 91.33 million tons, accounting for more than 46% of the total synthetic resin output. Filling and blending the existing polyolefins to make this general-purpose high polymer with large quantities, low prices, and convenient processing to achieve high performance is of great significance for further expanding the application field of polyolefins. Due to the non-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/02C08F8/06C08J3/28
Inventor 吴石山沈健
Owner NANJING UNIV