Elastomeric Composites
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Evaluation of the dispersion of carbon nanotubes in an elastomeric polyurethane and fatigue test
Abstract Two series of polyurethane (PU) and carbon nanotubes (CNT) based composites with 0.0, 0.25, 0.5 and 1.0 mass% of CNT were obtained from diluting a commercial masterbatch with 30 mass% CNT and using two different dispersion methods. The quality of the dispersions was assessed using optical microscopy, and scanning and transmission electron microscop
Polímeros. Publicado em: 18/03/2019
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2. Fractographic and rheological characterizations of CF/PP-PE-copolymer composites tested in tensile
Abstract This work shows the fractographic study of fractured surfaces resulted from tensile tests of thermoplastic composites based on poly(propylene-co-ethylene) (PP-PE) and modified PP-PE copolymers reinforced with continuous carbon fibers (CF). The PP-PE matrix was modified with two agents called AM1 (based on maleic anhydride) and AM2 (containing an ela
Polímeros. Publicado em: 29/06/2017
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3. Natural Nanotubes Reinforcing Heterophasic Polypropylene
Nanocomposites of high-impact polypropylene resin and organosilane-functionalized nanotubes in halloysite clay were prepared with the introduction of peroxide to promote selective incorporation of the filler into the polypropylene phase of the matrix, with minor insertion into the EPR elastomeric phase, thus improving the stiffness while preserving the high
Mat. Res.. Publicado em: 2015-04
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4. Development and characterization of post-consumer rubber tire powder, high density polyethylene and ethylene-octene-1copolymer ternary mixtures
Scrap tires are considered a type of waste that litters landfills and the environment in general. Due to its chemically cross-linked structure, this material cannot be recycled by conventional processes because it does not melt. This work examined the production of polymeric composites using high density polyethylene (HDPE) filled with rubber tire powder (RT
Polímeros. Publicado em: 2014-12
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5. Rheological and mechanical characterization of poly (methyl methacrylate)/silica (PMMA/SiO2) composites
The search for new materials with properties suitable for specific applications has increased the number of research studies to fill the market demands. The development of polymer composites by the addition of inorganic fillers to the poly(methyl methacrylate) (PMMA) increases the potential use of this polymer in various application fields. The main objectiv
Mat. Res.. Publicado em: 01/08/2014
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6. Electrical conductivity and thermal properties of functionalized carbon nanotubes/polyurethane composites
Multi-walled carbon nanotubes (MWCNTs) functionalized with amine and carboxyl groups were used to prepare polyurethane/MWCNT nanocomposites in two distinct concentrations: a lower value of 1 mass% (spray coating) and a higher one of ~50 mass% (buckypaper based). The MWCNT-NH2 sample contained only 0.5 mass% of amine groups, whereas MWCNT-COOH contained 5 mas
Polímeros. Publicado em: 13/03/2012
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7. Efeito da incorporação de fibras curtas de sílica amorfa em compósitos de polipropileno utilizados pela indústria automotiva nacional. / Effect of the incorporation of short amorphous silica fibers in polypropylene composites used by the national automotive industry.
The addition of silica fibers in polypropylene (PP) composites was investigated on this work as a proposal to develop new materials used in automotive industry, in order to enable the reduction of vehicle weight and the resulting fuel economy. The fibers are lightweight, made of amorphous silica and treated with amine silane for better interaction with the p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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8. Obtenção e caracterização de compostos elastoméricos a base de EPDM carregados com barita para serem empregados na fabricação de vestimentas para proteção radiológica
Neste trabalho estudou-se as propriedades dos elastômeros a base do copolímero de etilenopropileno-dieno monômero (EPDM) com a adição de barita, que é uma carga em pó, abrindo caminho para aplicação destes compostos na proteção e blindagem contra a radiação X, na forma de aventais, em substituição dos aventais a base de elastômero carregado c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
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9. Utilização de compostos elastoméricos à base de SBR carregados com barita em aventais isolantes de raios X
In this study it was studied the physical-mechanical properties of elastomers based on styrenebutadiene rubber (SBR) with the addition of barite, for application of these compounds in protecting in the shielding against radiation X, for the substitution of aprons form based on elastomer fillered with lead in ergonomic and economically advantageous conditions
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/03/2011
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10. Elastomeric nanocomposites based on MWCNTs : preparation, characterization, and applications / Nanocompositos elastomericos baseados em MWCNTs : preparação, caracterização, e aplicações
Polymeric nanocomposites based on carbon nanotubes (CNTs) have one of the highest technological potential due to the possibility of produce materials with improved mechanical properties, high electrical conductivity at low loadings (low percolation threshold), and good processability. These systems are versatile, may present astonishing properties, and are a
Publicado em: 2009
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11. Characterization of ground SBR scraps from shoe industry
Expanded poly(butadiene-co-styrene) (SBR), a residue of the shoe industry of Rio Grande do Sul, is a crosslinked material. For further utilization in recycling and reclaiming processes this residue was ground under ambient conditions. The obtained powder (SBR-r) was physically, thermally and chemically characterized and the results were analyzed as for its s
Materials Research. Publicado em: 2008-03
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12. Obtenção e caracterização de artefatos produzidos com resíduos elastoméricos vulcanizados
The aim of this study was to incorporate styrene-butadiene rubber (SBR) industrial scraps into a base formulation of identical composition used in the fabrication process of extruded profiles. Technical and environmental performance of the developed composites was evaluated. The scraps were collected and ground under ambient conditions. The powder obtained,
Publicado em: 2008