Electret Stability Related to Spherulites in Polypropylene

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    Abstract

    Electret charge stability has been related to the size of the spherulites in polypropylene. As the size of the spherulites is decreased the stability is increased. This is seen for isothermal conditions at 90 °C and 120 °C as well as for 90 % relative humidity at 50 °C. The charge release temperature is also increased in thermally stimulated voltage discharge experiments as the size of the spherulites is decreased. The size of the spherulites is controlled though the cooling rate from polypropylenes liquid state.
    Original languageEnglish
    JournalI E E E Transactions on Dielectrics and Electrical Insulation
    Volume22
    Issue number5
    Pages (from-to)2858-2863
    ISSN1070-9878
    DOIs
    Publication statusPublished - 2015

    Keywords

    • Crystals
    • Electrets
    • Humidity measurement
    • Polypropylene films
    • Spherulite

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