The excess molar volumes V-m(E) 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: alpha, volume expansivity; (partial derivativeV(m)(E)/partial derivativeT)(p); (partial derivativeH(E)/partial derivativeP)(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 alpha, and alpha(E) values rather well, while the calculated values of (partial derivativeV(m)(E)/partial derivativeT)(p) and (partial derivativeH(E)/partial derivativeP)(T) show general variation with the alkyl chain length of the alkoxypropanots. The results are discussed in terms of order or disorder creation. (C) 2004 Elsevier Ltd. All rights reserved.