| 학회 | 한국화학공학회 |
| 학술대회 | 2003년 봄 (04/25 ~ 04/26, 순천대학교) |
| 권호 | 9권 1호, p.844 |
| 발표분야 | 열역학 |
| 제목 | Phase Equilibria of Poly(methyl methacrylate) in High-Pressure Chlorodifluoromethane |
| 초록 | Phase behavior data are presented for poly(methyl methacrylate) (PMMA) in compressed liquid and supercritical chlorodifluoromethane. The cloud point curves of PMMA (MW = 15,000 and 120,000) in chlorodifluoromethane were measured at polymer concentrations up to about 12 wt. % and at temperatures and pressures to about 100℃ and 170 bar using the equilibrium apparatus equipped with a variable-volume view cell apparatus. This system exhibited the characteristics of a lower critical solution temperature phase behavior. The dissolving power of chlorodifluoromethane decreased as the temperature increased. The pressure-polymer concentration isotherms showed that the maximum cloud point pressure was observed at a polymer concentration between 2 and 5 wt. %. The cloud point pressure increased with increasing molecular weight of the PMMA. * This work was supported by grant No. R05-2002-000-00632-0 from Korea Science and Engineering Foundation. |
| 저자 | 김기호, 박익현, 이병철 |
| 소속 | 한남대 |
| 키워드 | poly(methyl methacrylate); chlorodifluoromethane; cloud point; variable-volume view cell |
| , , |
