Effect of polymer chain-length polydispersity on the phase behavior of model athermal mixtures of colloids and flexible self-excluding polymers - Archive ouverte HAL Access content directly
Journal Articles Chemical Physics Letters Year : 2004

Effect of polymer chain-length polydispersity on the phase behavior of model athermal mixtures of colloids and flexible self-excluding polymers

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Patrice Paricaud
Szabolcs Varga
  • Function : Author
Peter T. Cummings
  • Function : Author
George Jackson
  • Function : Author

Abstract

The effect of polymer polydispersity on the fluid-fluid demixing of an athermal mixture of colloids and self-excluding polymers is analysed with the first-order thermodynamic perturbation theory (TPT1) of Wertheim. The colloidal particles and the segments making up the polymer chains are modeled as hard spheres of different diameters. The polydispersity of the polymer is represented by a distribution of chain lengths. The polydispersity increases the extent of demixing; the critical composition remains relatively unaffected, while the critical packing fraction decreases substantially. The polymers with the longest chains are responsible for the increase in the extent of immiscibility

Dates and versions

hal-01153450 , version 1 (19-05-2015)

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Patrice Paricaud, Szabolcs Varga, Peter T. Cummings, George Jackson. Effect of polymer chain-length polydispersity on the phase behavior of model athermal mixtures of colloids and flexible self-excluding polymers. Chemical Physics Letters, 2004, 398 (4-6), pp.489-494. ⟨10.1016/j.cplett.2004.09.071⟩. ⟨hal-01153450⟩

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