6533b7d4fe1ef96bd1261d84

RESEARCH PRODUCT

NMR relaxation and solvation equilibrium in the ternary system CCl4-polymethylmethacrylate-benzene

Hans Lütje

subject

Solventchemistry.chemical_compoundSolvation shellTernary numeral systemChemistryImplicit solvationSolvationPhysical chemistryIon-associationBenzeneEquilibrium constant

description

In the ternary system CCl4-PMMA-benzene, benzene is preferentially adsorbed in the solvation shell of the polymer. One solvation equilibrium constant allows a satisfactory description of the preferential solvation for a large range of solvent compositions. The nuclear magnetic relaxation time T1 of benzene protons was measured for different values of the polymer concentration. The measurements are compared with analogous measurements in the system C6D6-PMMA-C6H6 where no preferential solvation is to be expected. For the system CCl4-PMMA-benzene the resulting dimensionless solvation equilibrium constant is K = c32c10/c12c30 = 2.5 ± 0.5 where c10 is the CCl4 concentration in the “free” solvent; c30 is the benzene concentration in the free solvent; c12 and c32 are the concentrations of CCl4 and benzene in contact with the polymer chain, respectively.

yearjournalcountryeditionlanguage
2007-03-07Journal of Polymer Science Part C: Polymer Symposia
https://doi.org/10.1002/polc.5070390129