XPS characterization of surface fluorinated poly(4-methyl-1-pentene)

Authors

  • J. M. Mohr,

    1. Department of Chemical Engineering, Center for Polymer Research, The University of Texas at Austin, Austin, Texas 78712
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  • D. R. Paul,

    Corresponding author
    1. Department of Chemical Engineering, Center for Polymer Research, The University of Texas at Austin, Austin, Texas 78712
    • Department of Chemical Engineering, Center for Polymer Research, The University of Texas at Austin, Austin, Texas 78712
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  • Y. Taru,

    1. Department of Chemical Engineering, Center for Polymer Research, The University of Texas at Austin, Austin, Texas 78712
    Current affiliation:
    1. Musashi Institute of Technology, 28-1 Tamazatsumi 1-chome, Setagaya-ku, Tokyo 158, Japan
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  • T. E. Mlsna,

    1. Department of Chemistry, Center for Polymer Research, The University of Texas at Austin, Austin, Texas 78712
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  • R. J. Lagow

    1. Department of Chemistry, Center for Polymer Research, The University of Texas at Austin, Austin, Texas 78712
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Abstract

The fluorinated surface layer of poly(4-methyl-1-pentene) membranes exposed to a dilute stream of fluorine gas has been characterized with X-ray photoelectron spectroscopy. The concentration and profile of reacted fluorine as a function of exposure time is determined. A computer routine was employed to deconvolute the poorly resolved carbon spectra after various fluorine exposure times. The concentrations of mono-, di-, and trifluorocarbon groups thus determined were used to propose specific structures of PMP at the surface after 1 and 15 min of fluorination. The carbon spectra collected at electron takeoff angles of 15°, 30°, and 90° were also deconvoluted, giving insight into the placement of fluorine as a function of depth. Oxygen is incorporated into the polymer during the fluorination reaction, and the O1s spectra was deconvoluted to determine how the oxygen is bound.

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