The 2-methoxyethanol plus 1,2-dimethoxyethane binary solvent system.: Refractive index and related properties from 0 to 70°C

The refractive properties of binary system containing 2-methoxyethanol (ME) and 1,2-dimethoxyethane (DME) have been measured at 15 temperatures in the 0 less than or equal to t/degrees C less than or equal to 70 range, working with the two pure species and 9 mixtures of them, covering the whole miscibility field (0 less than or equal to X-i less than or equal to 1). Many equations have been checked in order to establish the best relationships stating the dependence of n on temperature and binary composition, by taking into account both the mole fraction (rational) scale and the volume fraction scale. Furthermore, the excess functions n(E) and R-E (excess molar refraction) have been evaluated in order to investigated the existence of solvent-cosolvent complex adducts. As an evidence, we can suggest the presence of two complex moieties, namely 1ME . 1DME and 2ME . 1DME, which seem to be both thermostable at all investigated temperatures.