CONDENSATION OF SUPERSATURATED VAPORS OF DIOCTYLPHTHALATE - HOMOGENEOUS NUCLEATION RATE MEASUREMENTS

Homogeneous nucleation rates of dioctylphthalate (DOP) [1,2-benzenedic arboxylic acid (bis-2-ethyl hexyl ester)] ranging from 0.032 to 16.3 d rops cm-3 s-1 were measured as a function of supersaturation and tempe rature by using an upward thermal diffusion cloud chamber. The influen ce of thermodiffusiophoresis was included in raw data analysis. An emp irical formula was used to fit measured nucleation rates over a supers aturation range from 33 to 68 and temperatures ranging from 364 to 396 K. A comparison with earlier published data on critical supersaturati ons of DOP showed consistency of both measurements.