Temperature dependence of the volumetric properties of some alkoxypropanols + n-alkanol mixtures |
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| Institution: | 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China;2. University of Chinese Academy of Sciences, Beijing, China;3. Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto M3H 5T4, Canada;1. State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;2. Vehicle Emission Control Center of Ministry of Ecology and Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;3. Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | The excess molar volumes VmE for binary liquid mixtures containing dipropylene glycol monomethyl ether or dipropylene glycol monobutyl ether and methanol, 1-propanol, 1-pentanol and 1-heptanol have been measured as a function of composition using a continuous dilution dilatometer at T=(288.15, 298.15, and 308.15) K and atmospheric pressure over the whole concentration range. The excess volume results allowed the following mixing quantities to be reported in all range of concentrations or at equimolar concentrations: α, volume expansivity; (∂VmE/∂T)p; (∂HE/∂P)T at T=298.15 K. The obtained results have been compared at T=298.15 K with the calculated values by using the Flory theory of liquid mixtures. The theory predicts the α, and αE values rather well, while the calculated values of (∂VmE/∂T)p and (∂HE/∂P)T show general variation with the alkyl chain length of the alkoxypropanols. The results are discussed in terms of order or disorder creation. |
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