Detection of microgels in polyacrylamide solutions using microcapillary flow analysis

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

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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 languageEnglish (US)
Pages (from-to)693-702
Number of pages10
JournalJournal of Applied Polymer Science
Issue number3
StatePublished - Feb 20 1987

All Science Journal Classification (ASJC) codes

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


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