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Theoretical investigation of unimodal polydispersity effects on the cloud point behavior of polymer–solvent systems
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DOI：10.1016/j.fluid.2026.114728.png)
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Abstract
En 中文
Experimental investigations examining the influence of polymer polydispersity on liquid–liquid equilibrium (LLE) remain very scarce. The present study provides a theoretical investigation of the effect of polydispersity on the cloud-point behavior of polymer–solvent binary systems, offering a detailed analysis grounded in the characteristics of the polymer molecular weight distribution (MWD) profile. The approach is based on a discrete representation of the MWD through pseudo-components, combined with the PC-SAFT equation of state.
Keywords:
Polymer
Molecular weight distribution
Polydispersity
Phase equilibrium
Cloud point
Modeling
HDPE
High density polyethylene
HS
Hosemann–Schramek
LCST
Lower Critical Solution Temperature
LLE
Liquid–liquid equilibrium
MMax
MMax
Peak value of the molecular weight distribution along logM axis
logM
M¯n
M¯n
Number-average molecular weight
M¯w
M¯w
Weight-average molecular weight
MWD
Molecular weight distribution
M¯z
M¯z
Z-average molecular weight
PC-SAFT
Perturbed Chain – Statistical Associating Fluid Theory
PP
Polypropylene
VLE
Vapor–liquid equilibrium
W
W
Pseudo-component weight fraction in the polymer sample
w
w
Polymer weight fraction in the polymer–solvent system
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