6533b85cfe1ef96bd12bd60c
RESEARCH PRODUCT
Influence of low amounts of nanostructured silica and calcium carbonate fillers on the large-area dielectric breakdown performance of bi-axially oriented polypropylene
Mika PetterssonMatti KoponenIlkka RytoluotoMikko KarttunenKari LahtiSuvi Virtanensubject
PolypropyleneNanocompositeMaterials scienceDielectric strengthta114dielectric brakdown performanceComposite numberdielectric breakdown performancechemistry.chemical_compoundpolymer nanocomposite filmCalcium carbonatechemistryTransmission electron microscopysilicaHomogeneity (physics)calcium carbonateComposite materialNanoscopic scaleta116polypropylenedescription
Influence of low amounts (1.0-2.0wt-%) of nanostructured silica and calcium carbonate fillers on the large area dielectric breakdown performance of bi-axially oriented polypropylene (BOPP) is analyzed. A multi-breakdown measurement method based on the self-healing breakdown capability of metallized film is utilized for the breakdown characterization in order to cover relatively large total film areas, thus leading to results of higher relevance from the practical point-of-view. The dispersion and distribution qualities of filler particles at the nanoscale are evaluated with transmission electron microscopy (TEM) imaging. Weibull statistical analysis suggests that the breakdown distribution homogeneity can be improved with both the filler types. The 1.0wt-% silica-BOPP composite also shows a shift of the weakest points towards higher dielectric strength in comparison to the neat BOPP. However, with increasing filler content, new failure modes are introduced into the nanocomposites, hence decreasing the overall breakdown performance in the >5% breakdown probability region in comparison to the un-filled reference BOPP film.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |