Detection of microgels in polyacrylamide solutions using microcapillary flow analysis

Jeffrey H. Sugarman; Robert K. Prud'Homme; Martin A. Langhorst; Frederick W. Stanley

doi:10.1002/app.1987.070330301

Detection of microgels in polyacrylamide solutions using microcapillary flow analysis

Jeffrey H. Sugarman, Robert K. Prud'Homme, Martin A. Langhorst, Frederick W. Stanley

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6 Scopus citations

Abstract

A new technique for quantifying the amount of multimolecular microgel material in water‐soluble polymers is described. The enhanced velocity of the large microgels during flow through a 25 μm capillary is the basis for a separation between the microgels and dissolved polymer. With the use of laser‐excited fluorescence detection, the arrival of fluorescently‐tagged polyacrylamide samples at a downstream location is recorded. The presence of small amounts of microgel has a deleterious effect on the ability to filter polymer solutions. Analysis of samples before and after filtration suggests that a significant amount of microgel material above 8 μm in diameter is present in samples that exhibit poor filterability characteristics. Treatment of a sample with base is found to improve filterability and to decrease the amount of microgel in the sample.

Original language	English (US)
Pages (from-to)	693-702
Number of pages	10
Journal	Journal of Applied Polymer Science
Volume	33
Issue number	3
DOIs	https://doi.org/10.1002/app.1987.070330301
State	Published - Feb 20 1987

All Science Journal Classification (ASJC) codes

General Chemistry
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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10.1002/app.1987.070330301

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abstract = "A new technique for quantifying the amount of multimolecular microgel material in water‐soluble polymers is described. The enhanced velocity of the large microgels during flow through a 25 μm capillary is the basis for a separation between the microgels and dissolved polymer. With the use of laser‐excited fluorescence detection, the arrival of fluorescently‐tagged polyacrylamide samples at a downstream location is recorded. The presence of small amounts of microgel has a deleterious effect on the ability to filter polymer solutions. Analysis of samples before and after filtration suggests that a significant amount of microgel material above 8 μm in diameter is present in samples that exhibit poor filterability characteristics. Treatment of a sample with base is found to improve filterability and to decrease the amount of microgel in the sample.",

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AU - Sugarman, Jeffrey H.

AU - Prud'Homme, Robert K.

AU - Langhorst, Martin A.

AU - Stanley, Frederick W.

PY - 1987/2/20

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N2 - A new technique for quantifying the amount of multimolecular microgel material in water‐soluble polymers is described. The enhanced velocity of the large microgels during flow through a 25 μm capillary is the basis for a separation between the microgels and dissolved polymer. With the use of laser‐excited fluorescence detection, the arrival of fluorescently‐tagged polyacrylamide samples at a downstream location is recorded. The presence of small amounts of microgel has a deleterious effect on the ability to filter polymer solutions. Analysis of samples before and after filtration suggests that a significant amount of microgel material above 8 μm in diameter is present in samples that exhibit poor filterability characteristics. Treatment of a sample with base is found to improve filterability and to decrease the amount of microgel in the sample.

AB - A new technique for quantifying the amount of multimolecular microgel material in water‐soluble polymers is described. The enhanced velocity of the large microgels during flow through a 25 μm capillary is the basis for a separation between the microgels and dissolved polymer. With the use of laser‐excited fluorescence detection, the arrival of fluorescently‐tagged polyacrylamide samples at a downstream location is recorded. The presence of small amounts of microgel has a deleterious effect on the ability to filter polymer solutions. Analysis of samples before and after filtration suggests that a significant amount of microgel material above 8 μm in diameter is present in samples that exhibit poor filterability characteristics. Treatment of a sample with base is found to improve filterability and to decrease the amount of microgel in the sample.

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Detection of microgels in polyacrylamide solutions using microcapillary flow analysis

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