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| Type |
Poster Presentation |
| Area |
Polymer Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
POLY.P-46 |
| Subject |
Fabrication of carboxyl functionalized polystyrene particles by γ-ray radiation |
| Authors |
Jeong rae Kim, Daewon Sohn1,*
Hanyang University, Korea
1Department of Chemistry, Hanyang University, Korea
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| Abstract |
Functional polymer particles with various groups on the surface have extensive applications in various fields such as coatings, chromatography and biomedical analysis. The carboxyl group is one of the most important surface functional groups for particles for biomedical applications. In this research, one and two step methods were used to synthesize carboxyl functionalized polystyrene particles. In one step method, monomer, co-monomer, stabilizer, ethanol and water were stirred and radiated. But in two step method, entire stabilizer, half of the monomer, ethanol and water were stirred and radiated in first step, and then after putting the solvent which has entire comonomer, half of the monomer, ethanol and water, it was radiated again. The γ-ray radiation from 60Co source were used to initiate dispersion polymerization. Generally eaq-, H·and OH·are produced when water is irradiated with γ-rays, and H·and OH·initiate the polymerization of monomers. In two step method, delaying the addition of solvent helps to prevent secondary nucleation and it can promote the formation of monodiperse particles. So comparing to one step method, two step method particles were more uniformed and had more carboxyl group on the surface of particles. In one step method, size of particles was around 200-400nm, and in two step method size of particles was around 2-3㎛. |
| E-mail |
jraekim12@naver.com |
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121st General Meeting of the KCS