| 학회 |
한국고분자학회 |
| 학술대회 |
2002년 가을 (10/11 ~ 10/12, 군산대학교) |
| 권호 |
27권 2호, p.235 |
| 발표분야 |
고분자 합성 |
| 제목 |
Aromatic Polycarbonate Nano Particles via High Pressure Process Technology |
| 초록 |
A novel synthetic process for producing aromatic polycarbonate (PC) nano particles using supercritical CO2 was developed. It was the object of the present research work to synthesize high molecular weight PC nano particles using transesterification between bisphenol-A (BPA) and diphenyl carbonate (DPC) in supercritical CO2 which is an excellent plasticizing agent and a good solvent for phenol, by-product of the reaction. Fluoronic diblock and tri-block copolymer with CO2-phobic anchor and CO2-philic tail group was used as a stabilizer for the preparation of stable dispersions of BPA-DPC mixture in a CO2 continuous phase. As the reaction was proceeding, phenol formed from the reaction was dissolved and diffused into supercritical CO2 phase. The PC nano particles were isolated by simple venting of the supercritical CO2 from the reactor. Spherical morphology of PC particles was confirmed by scanning electron microscopy. Particle size and morphology of PC particles were modified upon variation of the process condition. The resulting PC particles with the nano-size of 30 to 140 nm has high molecular weight of 3.1×105 (Mw). |
| 저자 |
이준영, 김경일, 김중현
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| 소속 |
연세대 |
| 키워드 |
polycarbonate nano particles; supercritical carbon dioxide; high molecular weight
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| E-Mail |
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