Pre-irradiation induced grafting of styrene into crosslinked and non-crosslinked polytetrafluoroethylene films for polymer electrolyte fuel cell applications. I: Influence of styrene grafting conditions

Jingye Li, Kohei Sato, Shogo Ichiduri, Saneto Asano, Shigetoshi Ikeda, Minoru Iida, Akihiro Oshima, Yoneho Tabata, Masakazu Washio

    Research output: Contribution to journalArticle

    57 Citations (Scopus)

    Abstract

    Crosslinked and non-crosslinked polytetrafluoroethylene (PTFE) films [RX-PTFE and V-PTFE films, respectively], were irradiated in air at room temperature using γ-rays from a 60Co source. The irradiated films were grafted with styrene in liquid phase. The grafting of styrene into PTFE films was proved by FT-IR spectroscopy. The influence of the reaction temperature and pre-irradiation doses on the resulted degree of grafting was discussed. The grafting speed and the degree of grafting were determined by the reaction temperature and pre-irradiation doses. The apparent activation energies were calculated as 39.7 kJ/mol for RX-PTFE films and 59.5 kJ/mol for V-PTFE films. The dependence index on absorbed doses at pre-irradiation for RX-PTFE films is 0.66, and for V-PTFE films it is 1.57. The geometric size changes of the grafted films were measured and discussed. Interestingly, the thickness of the grafted films was strongly influenced by the reaction temperature. The tensile strength and the elongation at break of the non-grafted and grafted RX-PTFE and V-PTFE films were measured. The grafted films then are sulfonated by chlorosulfonic acid for polymer electrolyte fuel cell (PEFC) applications and the highest IEC value gained is over 3. The analysis of the sulfonated films are now in progress.

    Original languageEnglish
    Pages (from-to)775-783
    Number of pages9
    JournalEuropean Polymer Journal
    Volume40
    Issue number4
    DOIs
    Publication statusPublished - 2004 Apr

    Fingerprint

    Styrene
    polytetrafluoroethylene
    Polytetrafluoroethylene
    Polytetrafluoroethylenes
    styrenes
    Electrolytes
    fuel cells
    Fuel cells
    Polymers
    Irradiation
    electrolytes
    irradiation
    polymers
    Dosimetry
    dosage
    Temperature
    tensile strength
    elongation
    temperature
    Elongation

    Keywords

    • Crosslinked and non-crosslinked polytetrafluoroethylene
    • Polymer electrolyte fuel cell
    • Pre-irradiation induced graft polymerization
    • Styrene

    ASJC Scopus subject areas

    • Organic Chemistry
    • Polymers and Plastics

    Cite this

    Pre-irradiation induced grafting of styrene into crosslinked and non-crosslinked polytetrafluoroethylene films for polymer electrolyte fuel cell applications. I : Influence of styrene grafting conditions. / Li, Jingye; Sato, Kohei; Ichiduri, Shogo; Asano, Saneto; Ikeda, Shigetoshi; Iida, Minoru; Oshima, Akihiro; Tabata, Yoneho; Washio, Masakazu.

    In: European Polymer Journal, Vol. 40, No. 4, 04.2004, p. 775-783.

    Research output: Contribution to journalArticle

    Li, Jingye ; Sato, Kohei ; Ichiduri, Shogo ; Asano, Saneto ; Ikeda, Shigetoshi ; Iida, Minoru ; Oshima, Akihiro ; Tabata, Yoneho ; Washio, Masakazu. / Pre-irradiation induced grafting of styrene into crosslinked and non-crosslinked polytetrafluoroethylene films for polymer electrolyte fuel cell applications. I : Influence of styrene grafting conditions. In: European Polymer Journal. 2004 ; Vol. 40, No. 4. pp. 775-783.
    @article{ff061385456b478492e6a76e4d5497f2,
    title = "Pre-irradiation induced grafting of styrene into crosslinked and non-crosslinked polytetrafluoroethylene films for polymer electrolyte fuel cell applications. I: Influence of styrene grafting conditions",
    abstract = "Crosslinked and non-crosslinked polytetrafluoroethylene (PTFE) films [RX-PTFE and V-PTFE films, respectively], were irradiated in air at room temperature using γ-rays from a 60Co source. The irradiated films were grafted with styrene in liquid phase. The grafting of styrene into PTFE films was proved by FT-IR spectroscopy. The influence of the reaction temperature and pre-irradiation doses on the resulted degree of grafting was discussed. The grafting speed and the degree of grafting were determined by the reaction temperature and pre-irradiation doses. The apparent activation energies were calculated as 39.7 kJ/mol for RX-PTFE films and 59.5 kJ/mol for V-PTFE films. The dependence index on absorbed doses at pre-irradiation for RX-PTFE films is 0.66, and for V-PTFE films it is 1.57. The geometric size changes of the grafted films were measured and discussed. Interestingly, the thickness of the grafted films was strongly influenced by the reaction temperature. The tensile strength and the elongation at break of the non-grafted and grafted RX-PTFE and V-PTFE films were measured. The grafted films then are sulfonated by chlorosulfonic acid for polymer electrolyte fuel cell (PEFC) applications and the highest IEC value gained is over 3. The analysis of the sulfonated films are now in progress.",
    keywords = "Crosslinked and non-crosslinked polytetrafluoroethylene, Polymer electrolyte fuel cell, Pre-irradiation induced graft polymerization, Styrene",
    author = "Jingye Li and Kohei Sato and Shogo Ichiduri and Saneto Asano and Shigetoshi Ikeda and Minoru Iida and Akihiro Oshima and Yoneho Tabata and Masakazu Washio",
    year = "2004",
    month = "4",
    doi = "10.1016/j.eurpolymj.2003.11.018",
    language = "English",
    volume = "40",
    pages = "775--783",
    journal = "European Polymer Journal",
    issn = "0014-3057",
    publisher = "Elsevier Limited",
    number = "4",

    }

    TY - JOUR

    T1 - Pre-irradiation induced grafting of styrene into crosslinked and non-crosslinked polytetrafluoroethylene films for polymer electrolyte fuel cell applications. I

    T2 - Influence of styrene grafting conditions

    AU - Li, Jingye

    AU - Sato, Kohei

    AU - Ichiduri, Shogo

    AU - Asano, Saneto

    AU - Ikeda, Shigetoshi

    AU - Iida, Minoru

    AU - Oshima, Akihiro

    AU - Tabata, Yoneho

    AU - Washio, Masakazu

    PY - 2004/4

    Y1 - 2004/4

    N2 - Crosslinked and non-crosslinked polytetrafluoroethylene (PTFE) films [RX-PTFE and V-PTFE films, respectively], were irradiated in air at room temperature using γ-rays from a 60Co source. The irradiated films were grafted with styrene in liquid phase. The grafting of styrene into PTFE films was proved by FT-IR spectroscopy. The influence of the reaction temperature and pre-irradiation doses on the resulted degree of grafting was discussed. The grafting speed and the degree of grafting were determined by the reaction temperature and pre-irradiation doses. The apparent activation energies were calculated as 39.7 kJ/mol for RX-PTFE films and 59.5 kJ/mol for V-PTFE films. The dependence index on absorbed doses at pre-irradiation for RX-PTFE films is 0.66, and for V-PTFE films it is 1.57. The geometric size changes of the grafted films were measured and discussed. Interestingly, the thickness of the grafted films was strongly influenced by the reaction temperature. The tensile strength and the elongation at break of the non-grafted and grafted RX-PTFE and V-PTFE films were measured. The grafted films then are sulfonated by chlorosulfonic acid for polymer electrolyte fuel cell (PEFC) applications and the highest IEC value gained is over 3. The analysis of the sulfonated films are now in progress.

    AB - Crosslinked and non-crosslinked polytetrafluoroethylene (PTFE) films [RX-PTFE and V-PTFE films, respectively], were irradiated in air at room temperature using γ-rays from a 60Co source. The irradiated films were grafted with styrene in liquid phase. The grafting of styrene into PTFE films was proved by FT-IR spectroscopy. The influence of the reaction temperature and pre-irradiation doses on the resulted degree of grafting was discussed. The grafting speed and the degree of grafting were determined by the reaction temperature and pre-irradiation doses. The apparent activation energies were calculated as 39.7 kJ/mol for RX-PTFE films and 59.5 kJ/mol for V-PTFE films. The dependence index on absorbed doses at pre-irradiation for RX-PTFE films is 0.66, and for V-PTFE films it is 1.57. The geometric size changes of the grafted films were measured and discussed. Interestingly, the thickness of the grafted films was strongly influenced by the reaction temperature. The tensile strength and the elongation at break of the non-grafted and grafted RX-PTFE and V-PTFE films were measured. The grafted films then are sulfonated by chlorosulfonic acid for polymer electrolyte fuel cell (PEFC) applications and the highest IEC value gained is over 3. The analysis of the sulfonated films are now in progress.

    KW - Crosslinked and non-crosslinked polytetrafluoroethylene

    KW - Polymer electrolyte fuel cell

    KW - Pre-irradiation induced graft polymerization

    KW - Styrene

    UR - http://www.scopus.com/inward/record.url?scp=1642267575&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=1642267575&partnerID=8YFLogxK

    U2 - 10.1016/j.eurpolymj.2003.11.018

    DO - 10.1016/j.eurpolymj.2003.11.018

    M3 - Article

    AN - SCOPUS:1642267575

    VL - 40

    SP - 775

    EP - 783

    JO - European Polymer Journal

    JF - European Polymer Journal

    SN - 0014-3057

    IS - 4

    ER -