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논문 기본 정보

자료유형
학술저널
저자정보
Lee Sang-Myung (Applied Rheology Center Dept. of Chemical Engineering, Sogang University) Han Jae-Ro (Applied Rheology Center Dept. of Chemical Engineering, Sogang University) Kim Kyung-Yl (Applied Rheology Center Dept. of Chemical Engineering, Sogang University) Ahn Young-Joon (Applied Rheology Center Dept. of Chemical Engineering, Sogang University) Lee Jae-Wook (Applied Rheology Center Dept. of Chemical Engineering, Sogang University)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제18권 제2호
발행연도
2006.1
수록면
83 - 90 (8page)

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Supercritical carbon dioxide ($scCO_2$) has advantages of being incorporated in polymer with high solubility and of being recovered easily by depressurizing. $scCO_2$ reduces the viscosity of polymer melt and it is expected to be use as a plasticizing agent. In this work, we studied on the effect of $scCO_2$ on the rheological properties of polymer melts during extrusion process. Slit die attached to twin screw extruder was used to measure the viscosity of polymer melts plasticized by supercritical $CO_2$. A gas injection system was devised to accurately meter the supercritical $CO_2$ into the extruder barrel. Measurements of pressure drop within the die, confirmed the presence of a one phase mixture and a fully developed flow during the measurements. The viscosity measurement of polypropylene was performed at experimental conditions of various temperatures, pressures and $CO_2$ concentrations. We observed that melt viscosity of polymer was dramatically reduced by $CO_2$ addition.

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