Small-angle neutron scattering and volumetric studies of dilute solutions of N, N#-dimethylpropyleneurea in heavy water

摘要: Small-angle neutron scattering experiments and density measurements were performed on dilute solutions of N,N'-dimethylpropyleneurea (DMPU) in heavy water the mole fraction range 0.005(0.0025)-0.05 at 288.15, 298.15 313.15 K. From experimental results values radius gyration, second osmotic as well third molal volume virial coefficients, Kirkwood-Buff integrals calculated. The led to conclusions that DMPU has a structure-making effect pairwise solute-solute interactions exhibit no temperature dependence are less attractive than N,N'-dimethylethyleneurea tetramethylurea solutions.