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Radiation dispersion polymerization process of phenylethylene micro ball

A styrene microsphere and dispersion polymerization technology, applied in the field of radiation dispersion polymerization technology, can solve the problems of easy pollution and complicated process, and achieve the effect of strong operability, simple process and low pollution

Inactive Publication Date: 2005-03-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The general preparation methods of polymer microspheres mainly include emulsion polymerization, suspension polymerization, dispersion polymerization, seed swelling polymerization, etc., which are affected by temperature and time, and the process is complicated and easy to be polluted.

Method used

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  • Radiation dispersion polymerization process of phenylethylene micro ball

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Styrene monomer 14wt%, ethanol and water 84wt% (alcohol-water mass ratio is 5:1), polyvinylpyrrolidone 2wt%, disperse by ultrasonic for 15min, and then pass nitrogen gas to remove oxygen for 15min. Then it is irradiated with gamma rays with a dose of 100KGy to obtain microspheres with a size of about 1 μm.

Embodiment 2

[0024] Styrene monomer 20wt% (mass percentage), ethanol and water 86% (alcohol-water mass ratio is 5:1), polyvinylpyrrolidone 3%, disperse by ultrasonic for 15min, and then pass nitrogen gas to remove oxygen for 15min. Then it is irradiated with gamma rays with a dose of 200KGy to obtain microspheres with a size of 1.5 μm.

Embodiment 3

[0026] Styrene monomer 12% (mass percentage), ethanol and water 80% (alcohol-water mass ratio is 5:1), polyvinylpyrrolidone 1%, disperse by ultrasonic for 15min, and then pass nitrogen gas to remove oxygen for 15min. Then it is irradiated with gamma rays with a dose of 300KGy to obtain microspheres with a size of about 2 μm.

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Abstract

The present invention discloses radiating dispersion and polymerization process of styrene micro ball in the field of polymer material preparing technology. In styrene monomer, stabilizer PVP is added to disperse medium ethanol and water, gamma-ray irradiation initiates dispersed polymerization and separation, and styrene micro ball powder is obtained of 1-2 micron size after stoving. The present invention has simple process, no initiator pollution, no temperature limitation in preparing micron level polymer micro ball, and may be used widely in catalyst carrier, medicine, biochemical and electronic information material fields.

Description

technical field [0001] The invention belongs to the technical scope of polymer material preparation, and in particular relates to a radiation dispersion polymerization process of styrene microspheres. technical background [0002] Polymer microspheres have special properties such as good sphericity, small size, large specific surface area, strong adsorption, enrichment of functional groups on the surface, and strong surface reaction ability. As a functional material, the application of polymer microspheres has not only penetrated into all aspects of daily life, but also has entered high-tech fields such as medical and pharmaceutical fields, biochemical fields, and electronic information materials in the past ten years. The study of molecular microspheres has become a new research field of polymer science. Therefore, the preparation and application technology of polymer microspheres has attracted more and more attention. [0003] The general preparation methods of polymer m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/38C08F2/46C08F112/08
Inventor 梁彤祥王娟阎迎辉
Owner TSINGHUA UNIV
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