The viscosities and densities of nine binary n-alkan-1-ol systems, 1-propanol + 1-butanol, 1-propanol + 1-pentanol, 1-butanol + 1-pentanol, 1-butanol + 1-nonanol, 1-butanol + 1-decanol, 1-pentanol + 1-octanol, 1-heptanol + 1-octanol, 1-nonanol + 1-decanol, and 1-decanol + 1-undecanol, were experimentally determined over the entire composition range at temperatures of 293.15 K and 298.15 K and at atmospheric pressure. The experimental viscosity data were correlated by the McAllister three-body and four-body models and were used to test the predictive capability of the generalized corresponding state principle (GCSP) method.

SynopsisThe diffusion coefficient at zero penetrant concentration Q , of dichloromethane, chloroform, carbon tetrachloride, cyclohexane, benzene, o-xylene, m-xylene, p-xylene, and n-hexane in LDPE were measured at 25"C, using the desorption method. The 4 values obtained in this way are correlated with the size, shape, and chemical nature of the penetrant molecules. The temperature dependence of the diffusion coefficients of toluene and n-hexane in LDPE are also reported in the limited temperature range of 25-45°C. It indicates that, in spite of a size larger than that of toluene, n-hexane has a lower activation energy of diffusion.

A new method based on the effective carbon number is presented for predicting the McAllister model interaction parameters from pure component properties for regular binary liquid mixtures. The viscosity prediction results have been compared with experimental data for 128 binary systems representing 785 data points; the overall absolute average deviation has been found to be generally better than 3.6%.

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