Aspen Physical Property System - Physical Property Models

Then I2(�) and I3(�) are computed in terms of � by the expressions:
Reference
Jog, P. K., Sauer, S. G., Blaesing, J., & Chapman, W. G. (2001), Application
of Dipolar Chain Theory to the Phase Behavior of Polar Fluids and Mixtures.
Ind. Eng. Chem. Res., 40, 4641.
Rushbrooke, G. S., & Stell, G., Hoye, J. S. (1973), Molec. Phys., 26, 1199.
Copolymer PC-SAFT EOS Model Parameters
Pure parameters
Each non-association species (solvent or segment) must have a set of three
pure-component parameter; two of them are the segment diameter � and the
segment energy parameter �. The third parameter for a solvent is the
segment number m and for a segment is the segment ratio parameter r. For
an association species, two additional parameters are the effective association
volume � (AB) and the association energy � (AB) . For a polar species, two
additional parameters are the dipole moment � and the segment dipolar
fraction xp.
Binary parameters
There are three types of binary interactions in copolymer systems: solventsolvent,
solvent-segment, and segment-segment. The binary interaction
parameter �i�,j� allows complex temperature dependence:
with
where Tref is a reference temperature and the default value is 298.15 K.
The following table lists the copolymer PC-SAFT EOS model parameters
implemented in Aspen Plus:
2 Thermodynamic Property Models 45