The influence of supercritical gases on the phase behavior of polystyrene–cyclohexane and polyethylene–cyclohexane systems: experimental results and modeling with the SAFT-equation of state

Horst, M.H. ter; Behme, Stefan; Sadowski, Gabriele; Loos, Theo W. de

doi:10.1016/s0896-8446(01)00144-9

Cited by 21 publications

(11 citation statements)

References 15 publications

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“…The addition of carbon dioxide reduces the solvent power of methanol and shifts the LST to lower temperatures and higher pressures. This behavior is in accordance with other systems in literature. , Increasing the methanol concentrations or the polymer molar mass results in decreased LSTs. It could further be observed, that the polymer concentration at the lower critical solution temperature is lower than w polymer = 0.25 for all systems investigated.…”

Section: Resultssupporting

confidence: 93%

Phase Behavior of the System Linear Polyglycerol + Methanol + Carbon Dioxide

et al. 2011

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To compare the phase behavior of linear and hyperbranched polymers, the phase envelopes of the ternary system linear polyglycerol þ methanol þ carbon dioxide were determined for polymers of varying molar mass. Phase changes were detected by a static synthetic method using the Cailletet setup for temperatures between 331 K and 421 K and pressures up to 13.1 MPa. Besides the vaporÀliquid and liquidÀliquid equilibria, also the vaporÀliquid to vaporÀliquidÀliquid and vaporÀliquidÀliquid to liquidÀliquid phase boundaries are reported. The experimental results are similar to systems with hyperbranched polymers (rather than linear polymers). For the systems with linear polymers, however, the bubble-point pressures show no significant dependence on the polymer molar mass, whereas for hyperbranched polymers the bubble-point pressure was found to vary substantially with the polymer molecular mass. Further, the polymer concentration at the lower critical solution temperature is remarkably high when the polymers have a hyperbranched structure (Schacht et al., Fluid Phase Equilib. 2010, 299, 252À258), while the polymer concentration is much lower for systems with linear polymers.

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Section: Resultssupporting

confidence: 93%

Phase Behavior of the System Linear Polyglycerol + Methanol + Carbon Dioxide

et al. 2011

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“…Horst et al [122] studied the influence of supercritical gases in the phase behavior of the systems polystyrene-cyclohexane-gas and polyethylene-cyclohexane-gas, modeling the experimental data with the SAFT equation of state. As supercritical gases, the authors used ethane, propane and nitrogen.…”

Section: Polymeric Systems Modeling Using the Saft Equation And Its Mmentioning

confidence: 99%

A Survey of Equations of State for Polymers

Guerrieri¹,

Pontes²,

Costa³

et al. 2012

Polymerization

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“…1 [13]. The lower solution temperature (LST) line indicates the temperature at which two liquid phases merge as the temperature is isobarically decreased.…”

Section: Effect Of Supercritical Carbon Dioxide On Polymer-solvent MImentioning

confidence: 99%