Study on chemical structures of poly (tetrafluoroethylene-co-perfluoroalkylvinylether) by soft-EB irradiation in solid and molten state

Tomoyuki Kakigi, Akihiro Oshima, Nozomi Miyoshi, Katsuyoshi Murata, Kazuki Fujii, Naohiro Mitani, Tatsuya Urakawa, Yukiko Sato, Akio Matsuura, Jingye Li, Takaharu Miura, Etsuko Katoh, Masakazu Washio

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Poly (tetrafluoroethylene-co-perfluoroalkylvinylether) (PFA) was irradiated by soft electron beam (soft-EB) under nitrogen gas atmosphere in solid-state and its molten state, respectively. The changes of thermal property and chemical structures of irradiated PFA in solid-state and molten state were studied by differential scanning calorimetric analysis (DSC) and solid-state 19F magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. By DSC analysis, the melting temperature shifted to lower temperatures, and crystallinity decreased with increasing soft-EB dose. By solid-state 19F MAS NMR spectroscopy, the new signals was observed and the detected new signals in irradiated PFA at 315 °C and at 30 °C were due to the tertiary carbon group with branching site (Y-type crosslinking site), perfluoro-propylene site and chain end methylene groups, respectively. Moreover, the molar ratio of perfluoroalkylvinylether (FAVE) structure to -CF2- units decreased with increasing dose.

    Original languageEnglish
    Pages (from-to)118-124
    Number of pages7
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Volume265
    Issue number1
    DOIs
    Publication statusPublished - 2007 Dec

    Fingerprint

    Molten materials
    Electron beams
    Irradiation
    electron beams
    solid state
    Magic angle spinning
    irradiation
    magnetic resonance spectroscopy
    metal spinning
    Nuclear magnetic resonance spectroscopy
    Scanning
    dosage
    nuclear magnetic resonance
    scanning
    crosslinking
    propylene
    methylene
    Crosslinking
    Propylene
    Melting point

    Keywords

    • F MAS NMR
    • DSC
    • PFA
    • Soft-EB
    • Tertiary carbon
    • Y-type crosslinking

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films
    • Instrumentation
    • Surfaces and Interfaces

    Cite this

    Study on chemical structures of poly (tetrafluoroethylene-co-perfluoroalkylvinylether) by soft-EB irradiation in solid and molten state. / Kakigi, Tomoyuki; Oshima, Akihiro; Miyoshi, Nozomi; Murata, Katsuyoshi; Fujii, Kazuki; Mitani, Naohiro; Urakawa, Tatsuya; Sato, Yukiko; Matsuura, Akio; Li, Jingye; Miura, Takaharu; Katoh, Etsuko; Washio, Masakazu.

    In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 265, No. 1, 12.2007, p. 118-124.

    Research output: Contribution to journalArticle

    Kakigi, Tomoyuki ; Oshima, Akihiro ; Miyoshi, Nozomi ; Murata, Katsuyoshi ; Fujii, Kazuki ; Mitani, Naohiro ; Urakawa, Tatsuya ; Sato, Yukiko ; Matsuura, Akio ; Li, Jingye ; Miura, Takaharu ; Katoh, Etsuko ; Washio, Masakazu. / Study on chemical structures of poly (tetrafluoroethylene-co-perfluoroalkylvinylether) by soft-EB irradiation in solid and molten state. In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2007 ; Vol. 265, No. 1. pp. 118-124.
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    AU - Murata, Katsuyoshi

    AU - Fujii, Kazuki

    AU - Mitani, Naohiro

    AU - Urakawa, Tatsuya

    AU - Sato, Yukiko

    AU - Matsuura, Akio

    AU - Li, Jingye

    AU - Miura, Takaharu

    AU - Katoh, Etsuko

    AU - Washio, Masakazu

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