Dielectric properties of alumina-filled poly (ethylene-co-butyl acrylate) nanocomposites Part I - dry studies

Jäverberg, Nadejda; Edin, Hans; Nordell, Patricia; Nawaz, Sohail; Azhdar, Bruska; Gedde, Ulf W.

doi:10.1109/tdei.2012.6180229

Cited by 7 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The differences between the breakdown strength values for the remaining nanocomposites and the reference unfilled material in dry conditions are very small. This probably should be expected considering the results obtained earlier from the dielectric spectroscopy measurements [7]. This was also found in the literature, e.g.…”

Section: Resultssupporting

confidence: 85%

See 1 more Smart Citation

Dielectric breakdown strength of alumina filled poly (ethylene-co-butyl acrylate) nanocomposites

Jaeverberg

Venkatesulu

Edin

2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

Self Cite

View full text Add to dashboard Cite

Abstract-Dielectric breakdown strength of poly (ethylene-cobutyl acrylate) (EBA) nanocomposites filled with spherical alumina particles was studied as a function of particle coating and relative air humidity. The nanocomposites were prepared from a mixture of EBA formulations (13 wt% butyl acrylate groups content) and alumina powder. The particles were either unmodified or surface-treated with aminopropyltriethoxy silane or octyltriethoxy silane. The filler content studied was 6 wt%. Every material formulation was thoroughly examined under SEM in order to verify homogeneous particle dispersion. Two different relative humidities of air were used for conditioning the samples prior to testing: 0 and 86 % RH.The dielectric breakdown strength measurements were performed with a DC ramp of 1.2 kV/s. Ten samples were tested for each material formulation. Results were compared to the pristine EBA samples. Applying Weibull analysis to the measured data indicated a slight increase in breakdown strength for the dry nanocomposites filled with amino-treated particles as compared to the reference material in dry conditions. As expected, conditioning materials in humid environment had a negative impact on breakdown strength. This effect was more pronounced for nanocomposite materials, while the reference unfilled material was affected the least.

show abstract

Section: Resultssupporting

confidence: 85%

“…A thorough description of the materials data and manufacturing process can be found in [7]. The base material was filled with either as received alumina nanoparticles ('U' materials) or after surfacetreatment with either aminopropyl triethoxysilane ('A' materials) or octyl-triethoxysilane ('O' materials).…”

Section: A Materialsmentioning

confidence: 99%

Dielectric breakdown strength of alumina filled poly (ethylene-co-butyl acrylate) nanocomposites

Jaeverberg

Venkatesulu

Edin

2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

Self Cite

View full text Add to dashboard Cite

show abstract

“…Full description of the materials used and the compounding process can be found in [8,10]. Here only a short summary will be given.…”

Section: Methodsmentioning

confidence: 99%

“…Two different surface modifications were investigated in an attempt to understand its influence on dispersion and material properties. In a previous study [8][9][10] it was shown that nanocomposites with filler content of 6 wt% had best dispersion among the compositions manufactured and this study is therefore limited to mostly 6 wt% filler content. In order to see the trend for a different filler content two samples per material filled with 2 and 12 wt% of octyltreated ND alumina were included in the study as well.…”

Section: Introductionmentioning

confidence: 99%

Prebreakdown current and DC breakdown strength of alumina-filled poly(ethylene-co-butyl acrylate) nanocomposites: Part II - prebreakdown currents

Jaeverberg

Venkatesulu

Edin

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

Self Cite

View full text Add to dashboard Cite

Pre-breakdown currents through the poly (ethylene-co-butyl acrylate) (EBA) nanocomposites filled with spherical alumina particles were studied as a function of particle coating and moisture content. The nanocomposites were prepared from a mixture of EBA formulations (13 wt% butyl acrylate groups content) and alumina powder. Two kinds of alumina nanoparticles were used: NA (25 nm in diameter) and ND (45 nm in diameter). The particles were either unmodified or surface-treated with aminopropyltriethoxy silane or octyltriethoxy silane. Two different relative humidities of air were used for conditioning the samples prior to testing: 0 % RH (dry case) and 86 % RH (samples were saturated with moisture). The pre-breakdown current measurements were performed with a DC ramp of 1.2 kV/s. Twenty samples were tested for each material formulation -ten of which were tested in dry conditions and ten were tested after conditioning in humid environment. Results were compared to the reference unfilled EBA samples. The measured currents were analyzed under the assumption of space charge limited conduction. As expected, conditioning materials in humid environment caused an increase in pre-breakdown currents. This effect was more pronounced for nanocomposite materials, while the reference unfilled material was least affected.

show abstract

“…A detailed description of the materials and sample processing is presented in [6,7]. It can be summarized as follows.…”

mentioning

confidence: 99%

Influence of Applied Voltage and Temperature on the Current through the Alumina-filled poly(ethylene-co-butyl acrylate) Nanocomposites Under Constant Stress

Jaeverberg¹,

Venkatesulu²,

Jonsson³

et al. 2018

NORD-IS

View full text Add to dashboard Cite

<p>The current through the poly(ethylene-co-butyl acrylate) with 13 wt% of butyl acrylate (EBA) filled with 6 wt% of alumina nanoparticles with an approximate diameter of 45 nm was studied under constant stress application. The particles were either unmodified or surface-treated with aminopropyltriethoxy silane. The current was measured either until breakdown or for maximum stress duration of 10 minutes. Two voltage levels were chosen: 15 and 22.5 kV, which were low enough not to cause a breakdown during the ramping of the voltage at the rate of 490 V/s to the constant voltage level at room temperature. Several ramping rates {100, 260, 500, 1007} V/s were also tested for the reference unfilled material to evaluate its influence on the time to breakdown. Several temperature levels were tried: 20 (room temperature), 40 and 50 ºC.<br />As expected, higher applied voltage caused higher current through the materials, while higher temperature caused earlier breakdown as well as higher current. At the lower voltage level most of the materials survived the testing. At the higher voltage level most of the samples of the unfilled reference material failed at the temperatures above room temperature while most of the nanocomposite samples survived the testing even at higher temperatures.</p>

show abstract

Dielectric properties of alumina-filled poly (ethylene-co-butyl acrylate) nanocomposites Part I - dry studies

Cited by 7 publications

References 11 publications

Dielectric breakdown strength of alumina filled poly (ethylene-co-butyl acrylate) nanocomposites

Dielectric breakdown strength of alumina filled poly (ethylene-co-butyl acrylate) nanocomposites

Prebreakdown current and DC breakdown strength of alumina-filled poly(ethylene-co-butyl acrylate) nanocomposites: Part II - prebreakdown currents

Influence of Applied Voltage and Temperature on the Current through the Alumina-filled poly(ethylene-co-butyl acrylate) Nanocomposites Under Constant Stress

Contact Info

Product

Resources

About