Phase behavior of poly(ethylene-co-propylene) in ethylene and carbon dioxide: Experimental results and modeling with the statistical associating fluid theory equation of state
Tj. De Vries et al., Phase behavior of poly(ethylene-co-propylene) in ethylene and carbon dioxide: Experimental results and modeling with the statistical associating fluid theory equation of state, IND ENG RES, 39(12), 2000, pp. 4510-4515
For the application of supercritical carbon dioxide as a medium for polymer
processing, it is important to have reliable thermodynamic data of the sys
tems involved. In this study, experimental cloud-point data of binary syste
ms of ethylene-poly(ethylene-co-propylene) (PEP) are presented for differen
t molecular weights, 8.7 and 51 kg/mol, respectively. Also, the influence o
f carbon dioxide on the binary system ethylene-PEP51 is studied. Additional
ly, the experimental results have been modeled using the statistical associ
ating fluid theory equation of state. Using a single isopleth to determine
the binary interaction parameter between PEP and CO2, intermediate composit
ions can adequately be predicted.