Volumetric and Viscosimetric Measurements for Methanol + CH3-O-(CH2CH2O)n-CH3 (n = 2, 3, 4) Mixtures at (293.15-303.15) K and Atmospheric Pressure: Application of the ERAS Model was written by Gonzalez, Juan A.;Martinez, Francisco J.;Sanz, Luis F.;Hevia, Fernando;de la Fuente, Isaias Garcia;Cobos, Jose C.. And the article was included in Journal of Solution Chemistry in 2020.Application of 112-49-2 This article mentions the following:
Abstract: Densities, ρ, and kinematic viscosities, ν, have been determined at atm. pressure and at 293.15-303.15 K for binary mixtures formed by methanol and one linear polyether of the type CH3-O-(CH2CH2O)n-CH3 (n = 2, 3, 4). Measurements on ρ and ν were carried out, resp., using an Anton Paar DMA 602 vibrating-tube densimeter and an Ubbelohde viscosimeter. The ρ values were used to compute excess molar volumes, VEm, and, together with the ν results, dynamic viscosities (η). Deviations from linear dependence on mole fraction for viscosity, Δη, are also provided. Different semi-empirical equations have been employed to correlate viscosity data. Particularly, the equations used are the: Grunberg-Nissan, Hind, Frenkel, Katti-Chaudhri, McAllister and Heric. Calculations show that better results are obtained from the Hind equation. The VEm values are large and neg. and contrast with the pos. excess molar enthalpies, HEm, available in the literature, for these systems. Methanol + CH3-O-(CH2CH2O)n-CH3 mixtures have been treated in the framework of the ERAS model. Results for HEm are acceptable, while the composition dependence of the VEm curves is poorly represented. This has been ascribed to the existence of strong dipolar and structural effects in the present solutions In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2Application of 112-49-2).
2,5,8,11-Tetraoxadodecane (cas: 112-49-2) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly autoxidize to form hydroperoxides and dialkyl peroxides. If concentrated or heated, these peroxides may explode. To prevent such explosions, ethers should be obtained in small quantities, kept in tightly sealed containers, and used promptly.Application of 112-49-2
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem