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

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 of the composition, at 298.15 K and atmospheric pressure, using an 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 substantially larger negative excess volumes probably due to hydrogen bonding with the solvent. The system tetrahydrofuran + vinyl acetate presents near ideal behavior.