Flammability
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Adesivo de borracha termoplastica reforçado com nanoargila / Thermoplastic rubber adhesive reinforced with nanoclays
Adhesives prepared with thermoplastic rubber are very important for the pressure sensitive adhesives industry due to its easy processability. However, these adhesives are usually not indicated for applications in which temperature resistance around 90o C is required. In this study, thermoplastic rubber adhesives with nanoclays were prepared, in order to eval
Publicado em: 2008
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14. Natural rubber modified clay nanocomposite pressure sensitive adhesive / Adesivos sensiveis a pressão a base de nanocompositos de borracha e argila
Pressure sensitive adhesives (PSA) are polymeric adhesives used for mainly in tapes and labels. Usually, there are 3 types of PSA: solvent based, water based and hot melt. Solvent based adhesives have few limitations, like flammability and toxicity, but they are still often used, due to their properties as good adhesion to polar substrates and good bonding w
Publicado em: 2006
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15. Estudo das propriedades de nanocompositos de polipropileno/polipropileno grafitizado com anidrido maleico e montmorilonita organofilica
The study of nanocomposites, object of this project, was divided in two independent experimental parts. In the first esperimental part the obtention of organophilic montmorillonite from the cation xchange of a Na-montmorillonite for cations of quaternary hexadecyl trimethyl ammonium bromide, in aqueous solution, to prepare polymeric nanocomposites was studie
Publicado em: 2005
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16. Development and characteriztion of PP/flame retardant filler compositions. / Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama.
The main objective of this study was to develop and characterize polypropylene modified with flame retardant fillers. Two flame retardant fillers (Aluminum Hydroxide and Magnesium Hydroxide) were incorporated into four distinct types of polypropylene, two of which were homopolymers and two copolymers. The contents of the flame retardant fillers were 40 and 6
Publicado em: 2004
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17. Utilization of Magnesium Hydroxide Produced by Magnesia Hydration as Fire Retardant for Nylon 6-6,6
The present work investigates the use of magnesium hydroxide, produced by magnesia hydration, as a fire retardant in polymers. The hydration was carried out in an autoclave, at temperature of 130°C for 1 hour, and the product was further submitted to cominution in a jet mill. The solids were characterized with regard to their chemical composition, particle
Polímeros. Publicado em: 2001-09
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18. Estudo exploratorio da aplicabilidade dos meios supercriticos para a extração e o processamento de oleos vegetais com enfase em controle aplicado a unidade extratora
Since it was proposed in 20 s, the solvent extraction process for oilseeds has employed petrol-derived solvents. Even thought these extraction agents have been significantly improved in quality, the hexane (nowadays used) still presents detrimental features such as toxicity, non-renewability as well as high flammability. Supercritical solvents, most often th
Publicado em: 1998
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19. Response of C3 and C4 plants to middle-Holocene climatic variation near the prairie–forest ecotone of Minnesota
Paleorecords of the middle Holocene (MH) from the North American mid-continent can offer insights into ecological responses to pervasive drought that may accompany future climatic warming. We analyzed MH sediments from West Olaf Lake (WOL) and Steel Lake (SL) in Minnesota to examine the effects of warm/dry climatic conditions on prairie–woodland ecosystems
National Academy of Sciences.