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In this paper, two types of nanocomposites were prepared by ball milling techniquee The first type consists of 5% untreated titanium dioxide (TiO2) incorporated into LDPE. For the second one, 5% commercial TiO2 chemically treated with trisilanol phenyl polyhedral oligomeric silsesquioxane (TSP-POSS) as dispersant was ball-milled with LDPE. The microscopic observation by Atomic Force Microscopy (AFM)...
Knowledge has been pushed further regarding an epoxy composite containing Graphene-Oxide (GO) doped epoxy powder. It was put forward that GO could behave as a curing agent. This would explain the breakdown characteristics of the composites. In spite of being a nanostructured microcomposite, the samples breakdown can be favourably compared to that of neat epoxy. The presence of GO opens the door to...
Number of polymers can be reinforced by layered silicate fillers leading to polymeric nanocomposites with often superior breakdown strength and endurance and always higher dielectric losses. Investigations on the dielectric properties of PE/Clay nanocomposites have been reported several times and have shown a complex dielectric response closely related to the composite microstructure and its chemical...
This paper presents a new preparation method of nanocomposites using planetary milling of ceramic nanofiller with polymer matrix. The chosen matrix is High Density Poly Ethylene and the filler is nanometric fumed silica, raw or surface treated with two different silanes surfactants. The idea is to promote the penetration of nanosilica in HDPE grains using the high shear stress occurring during planetary...
Ball-milling of polyethylene and POSS in presence of a micrometric silica phase was used as a means to improve the distribution and dispersion of the POSS in the polymeric matrix. Optical observation has confirmed that this approach is effective in doing so. Using BDS, the polyethylene composite containing POSS 5% wt was found to have a very similar dielectric permittivity as compared to that of neat...
For the last decade, there has been lots of interest in the development of nanodielectrics as these materials may present superior dielectric properties when compared to traditional composites. However, the success of these materials relies on a proper dispersion of nanofillers within the matrix. In this work, UHMWPE/POSS composite of Ultra-High-Molecular Weight PolyEthylene (UHMWPE) with 5% wt Octaisobutyl...
In this paper, linear low density polyethylene (LLDPE) specimens containing from 0 to 5% of nanoclays were prepared from a commercially available premixed LLDPE/nanoclay masterbatch containing 50% wt of nanoclay. The masterbatch was diluted to the desire concentration by the addition of LLDPE pellets along with various amount of compatiblizer in order to achieve the best possible dispersion of the...
Microcomposites epoxies are widely used as high voltage insulation. A new way to improve such materials is to add nanoparticles to the epoxy matrix, thus forming a nanostructured microcomposite. For this study, epoxy composites films filled with 60 % wt of quartz microparticles were prepared, reinforced or not by 0.45% wt of organically modified Montmorillonite C30B. The dielectric breakdown strength...
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