초임계 용매내에서 Poly(ethylene-co-butene) 에 대한 이성분 및 삼성분계의 상거동 및 혼합물 밀도 = Phase Behavior and Mixture Densities of Binary and Ternary System for Poly (ethylene - co - butene) in Supercritical Solvents

다국어 초록 (Multilingual Abstract)

Phase equilibria and density of polymer in supercritical fluid are fundamental information for chemical process design and molecular structure analysis in polymer science. In this study, we measured high pressure phase equilibria and densities of poly(ethylene-co-butene)_10 and poly(ethylene-co-butene)_47 in two supercritical solvents; dimethyl ether (DME) and dimethyl ether-d (DME-d). A high-pressure moving-volume cell was used to measure the equilibrium properties.
High pressure phase equlibria of poly(ethylene-co-butene)_(10)-dimethyl ether were measured at 106∼185 ℃ and pressure range of 486∼1,100 bar. The similar system, polyethylene-dimethyl ether showed higher equilibrium line by 100∼350 bar. The liquid-liquid equilibrium line of poly(ethylene-co-butene)_(10)-dimethyl ether and poly(ethylene-co-butene)_(10)-dimethyl ether-d existed within 110∼150 ℃ below 1,000 bar. Phase behavior of poly(ethylene-co-butene)_(10) and poly(ethylene-co-butene)_(47) in dimethyl ether were also measured.