THE 2-METHOXYETHANOL PLUS 1,2-DIMETHOXYETHANE BINARY SOLVENT SYSTEM -REFRACTIVE-INDEX AND RELATED PROPERTIES FROM 0-DEGREES-C TO 70-DEGREES-C

The refractive properties of binary system containing 2-methoxyethanol (ME) and 1,2-dimethoxyethane (DME) have been measured at 15 temperatu res in the 0 less than or equal to t/degrees C less than or equal to 7 0 range, working with the two pure species and 9 mixtures of them, cov ering the whole miscibility field (0 less than or equal to X-i less th an or equal to 1). Many equations have been checked in order to establ ish 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 exces s functions n(E) and R-E (excess molar refraction) have been evaluated in order to investigated the existence of solvent-cosolvent complex a dducts. As an evidence, we can suggest the presence of two complex moi eties, namely 1ME . 1DME and 2ME . 1DME, which seem to be both thermos table at all investigated temperatures.