Density and other thermodynamic properties of the binary systems of tetrahydrofuran plus ethenyl ethanoate, methacrylic acid, butyl methacrylate, and allyl methacrylate at 298.15 K

摘要

Densities of the binary systems of tetrahydrofuran (THF) with ethenyl ethanoate (vinyl acetate), methacrylic acid, butyl methacrylate, and allyl methacrylate have been measured as a function or the composition, at 298.15 K and atmospheric pressure, using ail Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for the three binaries methacrylic acid + tetrahydrofuran, butyl methacrylate + tetrahydrofuran, and allyl methacrylate + tetrahydrofuran, and become smaller as the solute becomes more branched or longer. Methacrylic acid exhibits substaritially larger negative excess volumes probably due to hydrogen bonding with the solvent. The system tetrahydrofuran + vinyl acetate presents near ideal behavior.