Topic
Acetone
About: Acetone is a research topic. Over the lifetime, 9458 publications have been published within this topic receiving 120867 citations. The topic is also known as: propanone & dimethylketone.
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47 citations
TL;DR: In this article, a variety of polar aprotic solvents, including 1,4-dioxane, ethyl acetate, tetrahydrofuran, methyl iso-butyl ketone, acetone, acetonitrile, and gamma-valerolactone, were used.
47 citations
TL;DR: In this paper, a supercritical fluid-phase inversion process in which CO2 acts as the nonsolvent was used to obtain poly(methyl methacrylate) membranes that change with continuity from cellular structure to a structure formed by networked microparticles.
Abstract: Poly(methyl methacrylate) membranes have been prepared using a supercritical fluid-phase inversion process in which CO2 acts as the nonsolvent. Series of experiments were performed at various polymer concentrations, temperatures, and pressures using three different solvents, dimethylsulfoxide, acetone, and tetrahydrofuran. We operated at polymer concentrations ranging between 25 and 1% (w/w) in DMSO, acetone, and THF, obtaining membranes that change with continuity from cellular structure to a structure formed by networked microparticles. The membrane formation parameters in the case of DMSO and acetone have also been varied between 15 and 25 MPa and between 35 and 65°C. We observed that on increasing the pressure and decreasing the temperature, the cell size decreased. The influence of the solvent used on membrane formation has also been analyzed. On increasing the mutual affinity between solvent and nonsolvent, cell and pore sizes decrease and the structure changes from nearly closed to open interconnected cells. POLYM. ENG. SCI. 46:188–197, 2006. © 2005 Society of Plastics Engineers
47 citations
TL;DR: In this paper, the effect of different solvents on the coating characteristics was studied and two of their properties, viscosity and volatility, were used to analyze the results obtained.
47 citations
TL;DR: In this paper, a synthetic method was used for measuring the solubility of griseofulvin in acetone and ethanol-CO 2 mixtures, where CO 2 is added gradually to a liquid solution previously introduced in a sapphire cell.
Abstract: A synthetic method was used for measuring the solubility of griseofulvin in acetone–CO 2 and ethanol–CO 2 mixtures. In this method, CO 2 is added gradually to a liquid solution previously introduced in a sapphire cell of variable volume. Resulting mixtures may have compositions richer in organic solvents than in CO 2 , close to compositions found in the batch anti-solvent process. Measurements with the griseofulvin–CO 2 –acetone system were made at 312.15 K at 60 and 100 bar, and at 326.15 K and 100 bar. Concerning the griseofulvin–CO 2 –ethanol system, investigations were carried out at 100 bar at temperatures of 312.15 and 326.15 K. The solubility of griseofulvin in acetone decreases at all investigated conditions when the CO 2 is added. In this case, CO 2 is acting as an anti-solvent. In contrast to this, griseofulvin solubility in ethanol–CO 2 mixtures is higher than the solubility in either pure solvents within a certain range of CO 2 molar fractions. In this case, CO 2 is acting as a co-solvent and promotes the solubility of griseofulvin.
47 citations