Volumetric properties of binary systems between tetralin and alkylbenzenes

Excess molar volumes of binary mixtures of 1,2,3,4-tetrahydronaphthalene (t etralin) with benzene, toluene, ethylbenzene, n-propylbenzene, iso-propylbe nzene, n-butylbenzene, tert-butylbenzene, and sec-butylbenzene over the who le mole fraction range were measured with a continuous dilution dilatometer . All the experimental values, except that of benzene system, are negative. Flory theory and its extended form, the two-parameter method, were used to describe the volumetric properties. Theoretical prediction of volumetric p roperties is discussed in terms of the efficiency of the segmental contact sites. It is concluded that the two-parameter method can improve greatly th e theoretical results. (C) 1999 Elsevier Science B.V. All rights reserved.