Vapor pressure and molar standard enthalpies of vaporization of esters of 2-ethyl-2-(hydroxymethyl)1,3-propandiol (trimethylolpropane, IMP) and straight and branched carboxylic acids with chain length C-1, C-3-C-6, were determinated by the transpiration method. A linear correlation of vaporization enthalpies of trimethylolpropane esters with the number of carbon atoms and with the Kovat's indices on the non polar DB-1 GC column has been found. Enthalpies of vaporization of tested compounds were also calculated by QSPR-method. These results were checked by experimental values. (C) 2018 Elsevier B.V. All rights reserved.