We measured binary (vapor + liquid) equilibrium data for the {water + poly(ethylene glycol diacetyl ether) (PEGDAE) and methanol + PEGDAE} systems at pressures up to 400 kPa and temperatures from 333 K to 393 K. A static apparatus was used in this study. The measured data were correlated by the Peng-Robinson equation of state using the Wong-Sandler mixing rules with NRTL as the excess Gibbs free energy model. (c) 2006 Elsevier Ltd. All rights reserved.