Thermoplastic Composite
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Influence of coupling agent in compatibility of post-consumer HDPE in thermoplastic composites reinforced with eucalyptus fiber
This study investigates the feasibility of using recycled high density polyethylene (HDPE) and wood fiber from species Eucalyptus grandis (EU) to manufacture experimental composite panels. The use of maleated polyethylene as coupling agent (CA) improved the compatibility between the fiber and plastic matrix. The mechanical properties of the resultant composi
Mat. Res.. Publicado em: 25/03/2014
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14. A Review of Welding Technologies for Thermoplastic Composites in Aerospace Applications
Abstract: Reinforced thermoplastic structural detail parts and assemblies are being developed to be included in current aeronautic programs. Thermoplastic composite technology intends to achieve improved properties and low cost processes. Welding of detail parts permits to obtain assemblies with weight reduction and cost saving. Currently, joining composite
J. Aerosp. Technol. Manag.. Publicado em: 2012-09
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15. 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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16. Avaliação do efeito ambiental nas propriedades mecânicas do compósito de peek/fibra de carbono processado via moldagem por compressão a quente
A utilização de compósitos com matrizes termoplásticas na indústria aeronáutica aparece com forte tendência de utilização na construção de aeronaves, dado o seu potencial de produção a baixo custo, a sua possibilidade de reciclagem e a facilidade na execução de reparos. Dentre os polímeros termoplásticos utilizados em compósitos, o PEEK (po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/09/2011
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17. Nanocompósitos de argila montmorilonita, amido, gelatina, isolado protéico de soja e quitosana / Nanocomposites of montmorillonite clay, thermoplastic starch, gelatin, soy protein isolate and chitosan
Nanocomposites of maize starch, gelatin, soy protein isolate, chitosan and montmorillonite clay were developed for application in food packaging. To evaluate the effect of the sodium montmorillonite clay (MMT) and soy protein isolate (IPS) concentration in the mechanical properties and in the barrier of nanocomposites of maize starch and gelatin, it was adop
Publicado em: 2011
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18. Estudo para fabricação de refletores automobilísticos utilizando um material compósito termofixo e um material termoplástico / Study for manufacturing automobile reflectors using a thermoset composite material and a thermoplastic material
Na montagem de um farol automobilístico são utilizados diversos materiais, tais como insertos metálicos nas fixações, vidros nas lâmpadas, materiais poliméricos nas lentes, carcaças, molduras, vedações e refletores, além de vernizes, tintas, película de metal para reflexão do feixe luminoso. Há cerca de quatro décadas foi iniciada a confecçã
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2010
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19. Thermographic inspection of impact damage in solid fiber-reinforced polymer matrix composite laminates. / Inspeção termográfica de danos por impacto em laminados compósitos sólidos de matriz polimérica reforçada com fibras de carbono.
Continuous carbon fiber-reinforced thermosetting and thermoplastic composite laminates were exposed to single transversal impact with different energy levels. The damages marked to the structural materials were evaluated by active infrared thermography in transmission mode. In general, the thermoplastic laminate thermograms showed more clear and delineated d
Publicado em: 2010
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20. Biocomposites from high density biopolyethylene and curaua fibers / Biocompósitos a partir de biopolietileno de alta densidade reforçado por fibras de curauá
In this work, curaua fibers were used in the reinforcement of a high-density (HDPE) thermoplastic matrix. The polyethylene used in this study was obtained by polymerization of ethene produced from sugarcane ethanol. This polymer, also called high-density biopolyethylene (HDBPE), was prepared from a natural source material. The aim of the present study was to
Publicado em: 2010
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21. Development of extruded profiles from high density polyethylene and wood flour composites / Desenvolvimento de perfis extrudados de compósitos de polietileno de alta densidade com farinha de madeira
Polymer profiles extrusion shows some peculiarity due to the flow behavior of these materials during the processing. On the other hand, the profile die design and tooling has been more a result of professionals expertise than an engineering project in essence. In the present work, it was aimed to combining concepts of computers aided engineering to rheologic
Publicado em: 2009
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22. Processing and characterization of biocomposites of PHB with acetylated and no-acetylate natural fibres of coconut and sisal / Processamento e caracterização de biocompositos de PHB com fibras naturais de coco e sisal acetiladas e não-acetiladas
The problem of urban waste accumulation has increased in recent decades and the large consumption of plastics is one of those responsible for this situation. These materiaIs have the ability to remain in the environment for many years making it difficult further to provide its correct destination. This problem was the main motivation of the work presented he
Publicado em: 2008
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23. Preparation and characterization of mono-component two-phase system (SBM) by oxypropylation reaction of cellulose fibres and starch / Preparação e caracterização de sistema bifásico mono-componente (SBM) a partir da reação de oxipropilação de fibras celulósicas e amido
Chemical modifications were applied to cellulosic materials and starch with the objective to obtain products with an external thermoplastic layer while preserving the inner part of these substrates. The final products should behave as composite materials where the unmodified inner part is the reinforcement agent and the thermoplastic layer the matrix. The mo
Publicado em: 2007
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24. COMPORTAMENTO ELONGACIONAL DOS MATERIAIS TERMOPLÁSTICOS COMPÓSITOS / ELONGATIONAL BEHAVIOR OF COMPOSITE THERMOPLASTIC MATERIALS
Composite thermoplastic materials, like glass fiber reforced polypropropylene, are used increasingly in several industries. In particular, glass fiber reinforcement is used to improve the mechanical properties of thermoplastics, due to the high fiber modulous and to the better adesion between the fibers and the polymeric matrix. However, few data of material
Publicado em: 2007