Radiation-induced phenomena in ethylene-co-tetrafluoroethylene polymer: Temperature and LET effects

Akihiro Oshima, Masakazu Washio

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Irradiation temperature and linear energy transfer (LET) dependency on radiation-induced reactions of ethylene-co-tetrafluoroethylene polymer (ETFE) were investigated precisely by using low and high LET beams, and in a wide range of irradiation temperatures from 77 to 573 K including its melting temperature, respectively. At various temperatures irradiation by low LET beam such as γ-rays or electron beams, significant changes were observed in the photo-absorption spectra in the wavelength region between 200 and 500 nm. The general tendency is that the absorption band shifts to longer wavelengths with higher irradiation temperatures. The enhancement of the photo-absorption at 200-500 nm is due to the formation of conjugated double bonds in ETFE by irradiation. By high LET beam irradiation at room temperature such as ion beams, the photo-absorption spectra was different from those of low LET beams, i.e. the new absorption bands around 250-450 nm was appeared. It could be suggested that the high LET beams induced the production of intermediate species in a localized area such as track structure. As a result, reaction kinetics are different from low LET beams.

    Original languageEnglish
    Pages (from-to)380-384
    Number of pages5
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Volume208
    Issue number1-4
    DOIs
    Publication statusPublished - 2003 Aug

    Fingerprint

    linear energy transfer (LET)
    Energy transfer
    temperature effects
    Polymers
    Ethylene
    ethylene
    Radiation
    Irradiation
    polymers
    radiation
    irradiation
    Absorption spectra
    photoabsorption
    absorption spectra
    Temperature
    temperature
    Wavelength
    tetrafluoroethylene
    Reaction kinetics
    wavelengths

    Keywords

    • Double bonds
    • ETFE
    • Ion beams
    • LET
    • Optical density
    • Temperature

    ASJC Scopus subject areas

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

    Cite this

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    title = "Radiation-induced phenomena in ethylene-co-tetrafluoroethylene polymer: Temperature and LET effects",
    abstract = "Irradiation temperature and linear energy transfer (LET) dependency on radiation-induced reactions of ethylene-co-tetrafluoroethylene polymer (ETFE) were investigated precisely by using low and high LET beams, and in a wide range of irradiation temperatures from 77 to 573 K including its melting temperature, respectively. At various temperatures irradiation by low LET beam such as γ-rays or electron beams, significant changes were observed in the photo-absorption spectra in the wavelength region between 200 and 500 nm. The general tendency is that the absorption band shifts to longer wavelengths with higher irradiation temperatures. The enhancement of the photo-absorption at 200-500 nm is due to the formation of conjugated double bonds in ETFE by irradiation. By high LET beam irradiation at room temperature such as ion beams, the photo-absorption spectra was different from those of low LET beams, i.e. the new absorption bands around 250-450 nm was appeared. It could be suggested that the high LET beams induced the production of intermediate species in a localized area such as track structure. As a result, reaction kinetics are different from low LET beams.",
    keywords = "Double bonds, ETFE, Ion beams, LET, Optical density, Temperature",
    author = "Akihiro Oshima and Masakazu Washio",
    year = "2003",
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    TY - JOUR

    T1 - Radiation-induced phenomena in ethylene-co-tetrafluoroethylene polymer

    T2 - Temperature and LET effects

    AU - Oshima, Akihiro

    AU - Washio, Masakazu

    PY - 2003/8

    Y1 - 2003/8

    N2 - Irradiation temperature and linear energy transfer (LET) dependency on radiation-induced reactions of ethylene-co-tetrafluoroethylene polymer (ETFE) were investigated precisely by using low and high LET beams, and in a wide range of irradiation temperatures from 77 to 573 K including its melting temperature, respectively. At various temperatures irradiation by low LET beam such as γ-rays or electron beams, significant changes were observed in the photo-absorption spectra in the wavelength region between 200 and 500 nm. The general tendency is that the absorption band shifts to longer wavelengths with higher irradiation temperatures. The enhancement of the photo-absorption at 200-500 nm is due to the formation of conjugated double bonds in ETFE by irradiation. By high LET beam irradiation at room temperature such as ion beams, the photo-absorption spectra was different from those of low LET beams, i.e. the new absorption bands around 250-450 nm was appeared. It could be suggested that the high LET beams induced the production of intermediate species in a localized area such as track structure. As a result, reaction kinetics are different from low LET beams.

    AB - Irradiation temperature and linear energy transfer (LET) dependency on radiation-induced reactions of ethylene-co-tetrafluoroethylene polymer (ETFE) were investigated precisely by using low and high LET beams, and in a wide range of irradiation temperatures from 77 to 573 K including its melting temperature, respectively. At various temperatures irradiation by low LET beam such as γ-rays or electron beams, significant changes were observed in the photo-absorption spectra in the wavelength region between 200 and 500 nm. The general tendency is that the absorption band shifts to longer wavelengths with higher irradiation temperatures. The enhancement of the photo-absorption at 200-500 nm is due to the formation of conjugated double bonds in ETFE by irradiation. By high LET beam irradiation at room temperature such as ion beams, the photo-absorption spectra was different from those of low LET beams, i.e. the new absorption bands around 250-450 nm was appeared. It could be suggested that the high LET beams induced the production of intermediate species in a localized area such as track structure. As a result, reaction kinetics are different from low LET beams.

    KW - Double bonds

    KW - ETFE

    KW - Ion beams

    KW - LET

    KW - Optical density

    KW - Temperature

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