Solubility of benzyl methacrylate/methacrylic acid copolymers in carbon dioxide-expanded acetone and correlation with the PC-SAFT equation of state
作者： Scott M. Paap , Kurt Frey , Gregory R. Johnson , Jefferson W. Tester
DOI: 10.1016/J.FLUID.2014.05.001
关键词: Methacrylic acid 、 Precipitation (chemistry) 、 Phase (matter) 、 Solubility 、 Mole fraction 、 Chemistry 、 Analytical chemistry 、 Mass fraction 、 Polymer chemistry 、 Copolymer 、 Acetone
摘要: Abstract The high-pressure solid–liquid–vapor phase behavior of ternary systems comprising CO 2 , acetone, and benzyl methacrylate (BzMA)/methacrylic acid (MAA) copolymers has been probed experimentally modeled with the PC-SAFT equation state. Precipitation BzMA/MAA required a larger overall mole fraction – correspondingly higher system pressure in dilute solutions; however, minimum precipitation was observed for all copolymer compositions temperatures near -free mass 0.05. These were characterized by rapid reduction solubility over relatively narrow range (between 1.48 MPa 2.86 MPa). increased increasing temperature BzMA (per unit). EOS successfully used to correlate data using binary interaction parameters linear dependence. average relative error associated calculated each 4.1% composition examined. Liquid carbon dioxide monotonically increase solid pressure, implying that does not act as an antisolvent at (>5 wt%) fractions.
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