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조항규,김지은,임종성 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.5
The solubility of carbon dioxide (CO2) was investigated using three ionic liquids containing different numbers of cyano groups in the anion, 1-hexyl-3-methylimidazolium tricyanomethanide ([c6mim][C(CN)3]), 1-hexyl-3- methylimidazolium dicyanamide ([c6mim][N(CN)2]), and 1-hexyl-3-methylimidazolium thiocyanate ([c6mim][SCN]). The CO2 solubilities were determined by measuring the bubble point pressures of the CO2+ionic liquid mixtures at temperatures ranging from 303.15 to 373.15 K and pressure up to 105MPa. The experimental results showed that the solubilities of CO2 in ionic liquids increased with pressure, decreased with temperature, and increased with the length of the alkyl chains in the cation. Furthermore, a higher CO2 solubility was achieved in the ionic liquid with more cyano groups in the anion. The experimental data were correlated with the Peng-Robinson equation of state (PR-EoS), using the conventional van der Waals one fluid mixing rule and the modified Lydersen-Joback-Reid method. The average absolute deviation values of pressure (AAD-P) were 0.0658 for CO2+[c6mim][SCN], 0.0633 for CO2+[c6mim][N(CN)2], and 0.0761 for CO2+[c6mim][C(CN)3] system.
Poly(ethylene oxide-b-propylene oxide) allyl ether의 합성 및 물성에 대한 연구
조항규,노시태,김두원,권창식 한국공업화학회 2002 응용화학 Vol.6 No.1
Poly(ethylene oxide-b-propylene oxide) allyl ether (allyl P(EO-b-PO)) having reactive end group was synthesized by addition reaction of ethylene oxide (EO) and propylene oxide (PO) with allyl alcohol as initiator. Molecular weights and hydrophilic/hydrophobic balance of the block copolymer were controlled by the EO/PO ratios. Reaction conversion, side reaction, molecular weight, and purity of the resulting polymer demonstrated by ^1HNMR, FI-IRK and GPC studies.