Dielectric properties of nanostructured polypropylene-polyhedral oligomeric silsesquioxane compounds

Markus Takala, Mikko Karttunen, Pauliina Salovaara, Satu Kortet, Kari Kannus, Tapio Kalliohaka

    Research output: Contribution to journalArticleScientificpeer-review

    60 Citations (Scopus)


    This paper presents the results of the dielectric measurements conducted on polymer nanocompounds consisting of polypropylene (PP) and polyhedral oligomeric silsesquioxane (POSS). The material compounds were analyzed with a scanning electron microscope (SEM) and Raman-atomic force microscope (Raman-AFM). Ac and lightning impulse (LI) breakdown strength of the material compounds were measured. Relative permittivity, loss factor and volume resistivity measurements were also conducted on the material samples. Two types of POSS, octamethyl and isooctyl, were used in different quantities. The thickness of the samples was approximately 600 mum. Statistical analysis was applied to the results to determine the effects of the additive type and amount on the breakdown strength of polypropylene. The paper discusses the possibilities and restrictions in order to achieve advantages in high voltage applications using polyhedral oligomeric silsesquioxanes.
    Original languageEnglish
    Pages (from-to)40-51
    Number of pages12
    JournalIEEE Transactions on Dielectrics and Electrical Insulation
    Issue number1
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed


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