| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 기능성 고분자 |
| 제목 | Preparation and application of highly monodispersed nanoparticles by RAFT living radical emulsion polymerization |
| 초록 | Nano to micro scaled polymeric particles are applicable in many industrial fields-display, drug delivery system, toner, chromatographic column packing materials, protein purification and diagnostic sensor etc. The living radical polymerization is characterized by its unique reaction mechanism where radicals are weakly and reversibly combined to the polymeric chain ends to control the molecular weight very easily. A number of studies have been recently reported upon its synthetic mechanism in the single phase such as bulk or solution state, but few were upon emulsion or dispersion method. The iniferter is a key material that enable living radical polymerization to be successfully conducted, because it acts as an initiator, chain transfer, and terminator simultaneously. The sur-iniferter is a reagent where surfactant function is added to the sur-iniferter. When the living radical polymerization method is applied in the emulsion state using this sur-inferter, ionic charges can be provide on the growing polymeric particle surface. In this contribution, highly monodispersed polystyrene and poly(methyl methacrylate) nano-particles were prepared via living radical emulsion polymerization method. Anionic and cationic chares were provided on particle surface respectably. Average diameters of nanoparticles decreased from 500 to 80 nm with increasing sur-iniferter amounts with highly mono dispersed distribution. HLB of iniferter was another factor to control the size of nanoparticles. The living radical mechanism is special characters that enable re-activate to another monomer because of reversible function site and having functional group to end site. And the color particles were produced by using the special features. Dynamic light scattering and scanning electron microscope were main tools to analyze the size and distribution of nanoparticles prepared. |
| 저자 | 김주성1, 김덕준1, 곽주호2 |
| 소속 | 1성균관대, 2성림화학(주) |
| 키워드 | RAFT; nanoparticle |
