Measurements of activity coefficients at infinite dilution in bispheno
l-a-polycarbonate were carried out for a series of alkanes (C-8,C-9,C1
0C12), alcohols (C-3-C-10) and aromatics (toluene, ethylbenzene, propy
lbenzene, o-, m-, p-xylene, chlorobenzene, o-dichlorobenzene) at 160 d
egrees C, 180 degrees C and 200 degrees C using the inverse gas chroma
tography. Applying a gravimetric method, the solubilities of different
solvents (chlorobenzene, toluene, ethylbenzene, m-xylene, p-xylene an
d mesitylene) in the same polymer were measured. To model the absorpti
on data the SAFT equation of state was used. For this purpose the pure
-component parameters of the polymer had to be adjusted to the binary
data of one polycarbonate-solvent system. Using these parameters for t
he polymer, the experimental data of the other systems could be descri
bed well, too. (C) 1997 Elsevier Science B.V.