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CO2 를 이용한 Poly(DOMA-St) 의 합성과 PMMA 와의 상용성 고찰
박성영 ( S . Y . Park ),박희영 ( H . Y . Park ),김경훈 ( K . H . Kim ),박대원 ( D . W . Park ) 한국공업화학회 2000 응용화학 Vol.4 No.1
The aim of the study was to investigate the synthesis of a copolymer bearing cyclic carbonate and its miscibility with polymethylmethacrylate(PMMA). Poly [GMA(Glycidyl methacrylate)-St(Styrene)] was converted to poly[DOMA[(2-oxo-1,3-dioxolane-4-yl) methyl methacrylate]-St(Styrene)] by the polymer reaction with carbon dioxide using tetraoctyl ammonium chloride(TOAC) as a catalyst. The miscibility behavior various Poly(DOMA-St) with PMMA blend was studied using differential scanning calorimeter(DSC). Optical clarity test and DSC analysis showed that poly(DOMA-St) blends were miscible over the whole composition ranges with PMMA.
김창수(C. S. Kim),박성영(S. Y. Park),김형철(H. C. Kim),이영선(Y. S. Lee) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10
Vortex tube is the device that can separate small particles from the compressed gas, as well as compressed gas into hot and cold flow. Energy separation ability of vortex tube has been studied to investigate the possibility of the vortex tube as a substitute for an HVAC system of automobile. Experimental equipment has been made to obtain fundamental design parameters, energy separation characteristics has been analyzed for various supply pressure conditions. As increasing supply pressure, energy separation effect increased. Maximum temperature exists near 0.9 of the cold-out-flow-ratio, and minimum exists near 0.4. Based on the experimental results, the vortex tube for HVAC system of Electric Vehicle was redesigned. Also, detailed design is being processed to meet the air-volume of a commercial HVAC system.