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Photodegradation Of Poly(Tetrafluoroethylene) And Poly(Vinylidene Fluoride) Thin Films By Inner Shell Excitation

Author

Listed:
  • KOJI K. OKUDAIRA

    (Graduate School of Science and Technology, Chiba University, 1-33 yayoi-cho, Inage-ku, Chiba 263-8522, Japan;
    Institute for Molecular Science, Okazaki 444-8585, Japan)

  • HIROYUKI YAMANE

    (Graduate School of Science and Technology, Chiba University, 1-33 yayoi-cho, Inage-ku, Chiba 263-8522, Japan;
    Institute for Molecular Science, Okazaki 444-8585, Japan)

  • KAZUYUKI ITO

    (Graduate School of Science and Technology, Chiba University, 1-33 yayoi-cho, Inage-ku, Chiba 263-8522, Japan;
    Institute for Molecular Science, Okazaki 444-8585, Japan)

  • MOTOYASU IMAMURA

    (National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305-8565, Japan)

  • SHINJI HASEGAWA

    (Institute for Molecular Science, Okazaki 444-8585, Japan)

  • NOBUO UENO

    (Department of Materials Technology, Faculty of Engineering, Chiba University, 1-33 yayoi-cho, Inage-ku, Chiba 263-8522, Japan)

Abstract

Ion time-of-flight (TOF) mass spectra of poly(tetrafluoroethylene) (PTFE) and poly(vinylidene fluoride) (PVDF) thin films near fluorine and carbon K-edges were observed. For PTFE thin films, peaks corresponding toF+,CF+, and${\rm CF}^+_3$appeared, while for PVDFF+andH+were mainly observed. They indicate that for PTFE the polymer chain (C–C bonds) as well as C–F bonds are broken by irradiation of photons near fluorine and carbon K-edges, while for PVDF the bond scission occurs mainly at the C–F and C–H bond. Partial ion yields (PIY) of these ions for PTFE and PVDF thin films show strong photon energy dependencies near fluorine and carbon K-edges. The excitation from fluorine 1s toσ(C–F)*is specially efficient forF+ion production for both PTFE and PVDF.

Suggested Citation

  • Koji K. Okudaira & Hiroyuki Yamane & Kazuyuki Ito & Motoyasu Imamura & Shinji Hasegawa & Nobuo Ueno, 2002. "Photodegradation Of Poly(Tetrafluoroethylene) And Poly(Vinylidene Fluoride) Thin Films By Inner Shell Excitation," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 9(01), pages 335-340.
    • Handle: RePEc:wsi:srlxxx:v:09:y:2002:i:01:n:s0218625x02002294
    DOI: 10.1142/S0218625X02002294
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