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- W2010902915 abstract "Abstract The selfdiffusion coefficients D i , of the spherical molecule tetramethylsilane, TMS, and of n‐alkanes have been studied in three binary systems of n‐alkane/TMS in the temperature‐ und pressure range 253.15 ⩽ T /K ⩽ 368.15; 0.1 ⩽ P /MPa ⩽ 200. The mol fractions of TMS in the mixtures were chosen as x TMS = 0, 0.1, 0.9, and 1; the n‐alkanes were n‐hexane, n‐nonane, and n‐dodecane. Measurements of the mass densities at the chosen x TMS ‐values were done in the P,T ‐range given above. – The results of the D i measurements can be rationalized by a polynomial D i = f(P,T ). The molar volumes found from the mass density measurements are described by V M = f(p,T ) for the range covered by the experiments; they are described by a polynomial, too. Activation energies for the selfdiffusion process have been determined. – D i at constant P,T decreases in the sequence n‐hexane, TMS, n‐nonane, n‐dodecane. For the pure substances as well as for the components in the mixtures ( D i ) max /( D i ) min = 3.5 to 4. – The interpretation of the results relays on the “Free Volume” model [1]. From the data D i = f(P,T ) the selfdiffusion coefficients at constant volume have been extrapolated and their dependence from T 1/2 is discussed. The results of the measurements are interpreted by assuming folded conformations of the n‐alkanes in the mixtures with TMS. In the mixtures one component can be regarded as the solvent, dominating the properties of the solvent cage." @default.
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- W2010902915 title "Dependence of Mass Density and Selfdiffusion in Liquid Binary Systems n-Alkane/Tetramethylsilane on Temperature and Pressure" @default.
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- W2010902915 doi "https://doi.org/10.1002/bbpc.19930970102" @default.
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