Penetration kinetics into a previously adsorbed polymer layer

Harry E. Johnson, Steve Granick

Research output: Contribution to journalConference articlepeer-review

Abstract

We describe a study of the time evolution of the infrared bound fraction as a polymer penetrates into a previously adsorbed layer. The system is a near-theta system, poly(methyl-methacrylate) (PMMA) in carbon tetrachloride (CCL4). The following conclusions emerged: The mass turnover between the adsorbed state and free solution was minimal (<5%) over periods of hours; The bound fraction of the invading chains increased systematically with time elapsed, suggesting that the invading chains undergo a spreading process; The kinetics of the spreading process did not depend on the molecular weight of the invading chains, which suggests that penetration into the adsorbed layer was not rate-determining; Desorption of previously-adsorbed chains therefore appears to the rate-determining kinetic event in the present system.

Original languageEnglish (US)
Pages (from-to)523-524
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume31
Issue number2
StatePublished - Aug 1 1990
EventPapers presented at the Washington, DC Meeting 1990 of the ACS, Division of Polymer Chemistry - Washington, DC, USA
Duration: Aug 26 1990Aug 31 1990

ASJC Scopus subject areas

  • Materials Science(all)
  • Polymers and Plastics
  • Engineering(all)

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