Electrical and thermomechanical properties of epoxy-POSS nanocomposites

Boček, J.; Matějka, Libor; Mentlík, Václav; Trnka, Pavel; Šlouf, Miroslav

doi:10.1016/j.eurpolymj.2011.02.023

Cited by 58 publications

(29 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The moderate increase of T g followed by a moderate drop upon 10wt% was confirmed later by Bocek et al [186] in a DGEBA -3,3'-dimethyl-4,4'-diaminocyclohexylmethane (Laromin C260 ®;) system crosslinked with octa(glycidyloxypropyl)POSS. In this case, dynamics were studied by DMA, that showed prominent broadening, eventually reaching total absence of an α peak at 74wt%.…”

Section: Epoxy -Possmentioning

confidence: 57%

Segmental dynamics in hybrid polymer/POSS nanomaterials

Raftopoulos

Pielichowski

2016

Progress in Polymer Science

161

105

View full text Add to dashboard Cite

Section: Epoxy -Possmentioning

confidence: 57%

Segmental dynamics in hybrid polymer/POSS nanomaterials

Raftopoulos

Pielichowski

2016

Progress in Polymer Science

161

105

View full text Add to dashboard Cite

“…On the other hand, the behavior of dispersed conductive fillers is very-well known [45,46,47,48] and percolation threshold could be estimated based on the significant increase of conductivity. However, the dielectric parameters of basic material could be improved by addition of relatively low amount of nanofiller, as is evident from our previous studies [49,50,51]. In connection with these claims, the study [52] describes a theory of percolation and interfacial characterisation via breakdown voltage measurement.…”

Section: Improvement Of Epoxy Based Composites Insulating Propertiesmentioning

confidence: 91%

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

et al. 2018

View full text Add to dashboard Cite

Composite insulation materials are an inseparable part of numerous electrical devices because of synergy effect between their individual parts. One of the main aims of the presented study is an introduction of the dielectric properties of nanoscale magnesium oxide powder via Broadband Dielectric Spectroscopy (BDS). These unique results present the behavior of relative permittivity and loss factor in frequency and temperature range. Following the current trends in the application of inorganic nanofillers, this article is complemented by the study of dielectric properties (dielectric strength, volume resistivity, dissipation factor and relative permittivity) of epoxy-based composites depending on the filler amount (0, 0.5, 0.75, 1 and 1.25 weight percent). These parameters are the most important for the design and development of the insulation systems. The X-ray diffraction patterns are presented for pure resin and resin with optimal filler amount (1 wt %), which was estimated according to measurement results. Magnesium oxide nanoparticles were also treated by addition of silane coupling agent (γ-Glycidoxypropyltrimethoxysilane), in the case of optimal filler loading (1 wt %) as well. Besides previously mentioned parameters, the effects of surface functionalization have been observed by two unique measurement and evaluation techniques which have never been used for this evaluation, i.e., reduced resorption curves (RRCs) and voltage response method (VR). These methods (developed in our departments), extend the possibilities of measurement of composite dielectric responses related to DC voltage application, allow the facile comparability of different materials and could be used for dispersion level evaluation. This fact has been confirmed by X-ray diffraction analyses.

show abstract

“…Furthermore, higher thermal stabilities of POSS composites have been reported in [8,16], as well as improved thermo-mechanical properties of such nanostructured materials [7].…”

Section: Introductionmentioning

confidence: 98%

“…POSS, being a hybrid inorganicorganic material, further combines the beneficial material properties of ceramics, such as inertness and electrical Manuscript received on 6 October 2014, in final form 9 December 2014, accepted 12 December 2014. insulating properties, with the processability of polymers. It was previously denoted as a "Nano-building-block", because of its crystalline structure [7,8], enabling POSS to organize a polymeric matrix through its reactive groups on a nanometric scale. POSS molecules, commonly with sizes below 2 nm, are assumed to be able to dissolve within a polymer without forming agglomerations known from conventional nanoparticles [9].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured epoxy/POSS composites: enhanced materials for high voltage insulation applications

Heid

Fréchette

David

2015

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

In this study, the dielectric and thermal properties of nanostructured epoxy/POSS (Polyhedral Oligomeric Silsesquioxanes) composites were investigated, using a reactive Triglycidylisobutyl-POSS (TGIB-POSS) additive from 1 up to 10 wt%. POSS has been successfully dispersed at a molecular level for low content composites, which show a remarkably improved resistance to corona discharges, with up to 60% less eroded sample volume, along with significantly increased dielectric breakdown strengths and thermal conductivities. Epoxy/POSS composites containing 5 wt% and more of the POSS additive exhibit agglomerations, which have been observed by SEM. Furthermore, dielectric spectroscopy revealed additional interfacial loss peaks for such composites containing 5 wt% POSS and more, in addition to the α-and β-peaks known for epoxy.

show abstract

Electrical and thermomechanical properties of epoxy-POSS nanocomposites

Cited by 58 publications

References 14 publications

Segmental dynamics in hybrid polymer/POSS nanomaterials

Segmental dynamics in hybrid polymer/POSS nanomaterials

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

Nanostructured epoxy/POSS composites: enhanced materials for high voltage insulation applications

Contact Info

Product

Resources

About