Partitioning Inversion of a Bimodal Polymer Solution in Confined Geometries

Iwao Teraoka; Ziming Zhou; Kenneth H. Langley; Frank E. Karasz

doi:10.1021/ma00064a038

Partitioning Inversion of a Bimodal Polymer Solution in Confined Geometries

Iwao Teraoka, Ziming Zhou, Kenneth H. Langley, Frank E. Karasz

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The partitioning of solvated polymer molecules with a bimodal molecular weight distribution between a confined geometry such as a porous medium and an external free volume has been investigated. Applying the results of renormalization group theory, we derive the chemical potentials in the interior and exterior of the pore for each fraction of the polymer in equilibrium. It was found that, as the concentration of the high molar mass macromolecule exceeds the overlap concentration in the exterior, the low molar mass fraction is driven into the restricted pore channels, while the high molar mass fraction remains outside. We note that this segregation effect could in principle be used to recover a low molar mass fraction in high purity from a mixture. The implication of this finding with respect to size-exclusion chromatography is also briefly mentioned.

Original language	English (US)
Pages (from-to)	3223-3226
Number of pages	4
Journal	Macromolecules
Volume	26
Issue number	12
DOIs	https://doi.org/10.1021/ma00064a038
State	Published - 1993

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma00064a038

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abstract = "The partitioning of solvated polymer molecules with a bimodal molecular weight distribution between a confined geometry such as a porous medium and an external free volume has been investigated. Applying the results of renormalization group theory, we derive the chemical potentials in the interior and exterior of the pore for each fraction of the polymer in equilibrium. It was found that, as the concentration of the high molar mass macromolecule exceeds the overlap concentration in the exterior, the low molar mass fraction is driven into the restricted pore channels, while the high molar mass fraction remains outside. We note that this segregation effect could in principle be used to recover a low molar mass fraction in high purity from a mixture. The implication of this finding with respect to size-exclusion chromatography is also briefly mentioned.",

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AU - Teraoka, Iwao

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Y1 - 1993

N2 - The partitioning of solvated polymer molecules with a bimodal molecular weight distribution between a confined geometry such as a porous medium and an external free volume has been investigated. Applying the results of renormalization group theory, we derive the chemical potentials in the interior and exterior of the pore for each fraction of the polymer in equilibrium. It was found that, as the concentration of the high molar mass macromolecule exceeds the overlap concentration in the exterior, the low molar mass fraction is driven into the restricted pore channels, while the high molar mass fraction remains outside. We note that this segregation effect could in principle be used to recover a low molar mass fraction in high purity from a mixture. The implication of this finding with respect to size-exclusion chromatography is also briefly mentioned.

AB - The partitioning of solvated polymer molecules with a bimodal molecular weight distribution between a confined geometry such as a porous medium and an external free volume has been investigated. Applying the results of renormalization group theory, we derive the chemical potentials in the interior and exterior of the pore for each fraction of the polymer in equilibrium. It was found that, as the concentration of the high molar mass macromolecule exceeds the overlap concentration in the exterior, the low molar mass fraction is driven into the restricted pore channels, while the high molar mass fraction remains outside. We note that this segregation effect could in principle be used to recover a low molar mass fraction in high purity from a mixture. The implication of this finding with respect to size-exclusion chromatography is also briefly mentioned.

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Partitioning Inversion of a Bimodal Polymer Solution in Confined Geometries

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