Large-area dielectric breakdown performance of polymer films: Part II: Interdependence of filler content, processing and breakdown performance in polypropylene-silica nanocomposites

Ilkka Rytöluoto, Kari Lahti, Mikko Karttunen, Matti Koponen, Suvi Virtanen, Mika Pettersson

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

In this study, large-area dielectric breakdown performances of various bi-axially oriented polypropylene (BOPP)-silica nanocomposite films are studied by utilizing the self-healing multi-breakdown method presented in the Part I of this publication. In particular, the effects of silica filler content, pre-mixing method, co-stabilizer content and film processing on the large-area breakdown performance are analyzed. Nanostructural and film cross-sectional analyses are correlated to the breakdown responses. The optimum silica filler content is found to reside at the low fill fraction level (~1 wt-%) and automatic pre-mixing of the raw materials and the optimization of the orientation temperature are found to be preferable. The co-stabilizer Irgafos 168 is found to have a significant effect on the breakdown distribution homogeneity of the reference BOPP films. The breakdown response of the silica nanocomposites is found to be not only dependent on the active measurement area but also on the voltage ramp rate, indicating that the silica nanocomposites exhibit altered internal charge behavior under DC electric field. The area- and ramp-rate-dependence results exemplify the importance of careful breakdown strength evaluation of dielectric polymer nanocomposites. Above all, the results emphasize the fact that a thorough understanding and the optimization of the film processing parameters are crucial for achieving improved breakdown response in dielectric polymer nanocomposite films.
Original languageEnglish
Pages (from-to)2196-2206
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume22
Issue number4
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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Electric breakdown
Polymer films
Fillers
Polypropylenes
Nanocomposites
Silica
Processing
Nanocomposite films
Raw materials
Electric fields
Electric potential
Polymers
Temperature

Keywords

  • dielectric polymer nanocomposite
  • polypropylene
  • silica
  • pre-mixing
  • film processing
  • breakdown performance
  • area-dependence

Cite this

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title = "Large-area dielectric breakdown performance of polymer films: Part II: Interdependence of filler content, processing and breakdown performance in polypropylene-silica nanocomposites",
abstract = "In this study, large-area dielectric breakdown performances of various bi-axially oriented polypropylene (BOPP)-silica nanocomposite films are studied by utilizing the self-healing multi-breakdown method presented in the Part I of this publication. In particular, the effects of silica filler content, pre-mixing method, co-stabilizer content and film processing on the large-area breakdown performance are analyzed. Nanostructural and film cross-sectional analyses are correlated to the breakdown responses. The optimum silica filler content is found to reside at the low fill fraction level (~1 wt-{\%}) and automatic pre-mixing of the raw materials and the optimization of the orientation temperature are found to be preferable. The co-stabilizer Irgafos 168 is found to have a significant effect on the breakdown distribution homogeneity of the reference BOPP films. The breakdown response of the silica nanocomposites is found to be not only dependent on the active measurement area but also on the voltage ramp rate, indicating that the silica nanocomposites exhibit altered internal charge behavior under DC electric field. The area- and ramp-rate-dependence results exemplify the importance of careful breakdown strength evaluation of dielectric polymer nanocomposites. Above all, the results emphasize the fact that a thorough understanding and the optimization of the film processing parameters are crucial for achieving improved breakdown response in dielectric polymer nanocomposite films.",
keywords = "dielectric polymer nanocomposite, polypropylene, silica, pre-mixing, film processing, breakdown performance, area-dependence",
author = "Ilkka Ryt{\"o}luoto and Kari Lahti and Mikko Karttunen and Matti Koponen and Suvi Virtanen and Mika Pettersson",
year = "2015",
doi = "10.1109/TDEI.2015.004764",
language = "English",
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journal = "IEEE Transactions on Dielectrics and Electrical Insulation",
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Large-area dielectric breakdown performance of polymer films : Part II: Interdependence of filler content, processing and breakdown performance in polypropylene-silica nanocomposites. / Rytöluoto, Ilkka; Lahti, Kari; Karttunen, Mikko; Koponen, Matti; Virtanen, Suvi; Pettersson, Mika.

In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 22, No. 4, 2015, p. 2196-2206.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Large-area dielectric breakdown performance of polymer films

T2 - Part II: Interdependence of filler content, processing and breakdown performance in polypropylene-silica nanocomposites

AU - Rytöluoto, Ilkka

AU - Lahti, Kari

AU - Karttunen, Mikko

AU - Koponen, Matti

AU - Virtanen, Suvi

AU - Pettersson, Mika

PY - 2015

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AB - In this study, large-area dielectric breakdown performances of various bi-axially oriented polypropylene (BOPP)-silica nanocomposite films are studied by utilizing the self-healing multi-breakdown method presented in the Part I of this publication. In particular, the effects of silica filler content, pre-mixing method, co-stabilizer content and film processing on the large-area breakdown performance are analyzed. Nanostructural and film cross-sectional analyses are correlated to the breakdown responses. The optimum silica filler content is found to reside at the low fill fraction level (~1 wt-%) and automatic pre-mixing of the raw materials and the optimization of the orientation temperature are found to be preferable. The co-stabilizer Irgafos 168 is found to have a significant effect on the breakdown distribution homogeneity of the reference BOPP films. The breakdown response of the silica nanocomposites is found to be not only dependent on the active measurement area but also on the voltage ramp rate, indicating that the silica nanocomposites exhibit altered internal charge behavior under DC electric field. The area- and ramp-rate-dependence results exemplify the importance of careful breakdown strength evaluation of dielectric polymer nanocomposites. Above all, the results emphasize the fact that a thorough understanding and the optimization of the film processing parameters are crucial for achieving improved breakdown response in dielectric polymer nanocomposite films.

KW - dielectric polymer nanocomposite

KW - polypropylene

KW - silica

KW - pre-mixing

KW - film processing

KW - breakdown performance

KW - area-dependence

U2 - 10.1109/TDEI.2015.004764

DO - 10.1109/TDEI.2015.004764

M3 - Article

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SP - 2196

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JO - IEEE Transactions on Dielectrics and Electrical Insulation

JF - IEEE Transactions on Dielectrics and Electrical Insulation

SN - 1070-9878

IS - 4

ER -