Elastomer Of Polyurethane
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. SYNTHESIS OF TOLUENE DIISOCYANATE URETHANE PREPOLYMER USING CASTOR OIL AND EVALUATION OF MECHANICAL PROPERTIES
This research is the synthesis of urethane prepolymer cast elastomer which had been produced using toluene diisocyanate and castor oil to replace the synthetic polyol, from petroleum origin, and the evaluation of mechanical properties of the polyurethane. The focus was to replace polyol from petroleum to vegetable material looking for renewable resources. Th
Química Nova. Publicado em: 2022
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2. Evaluation of Filler Effects on the Dynamic Mechanical Behavior of HTPB-Elastomer Used as Binder in Exemplary Composite Formulations
ABSTRACT: This study aims to evaluate the dynamic mechanical properties of a binder, used in composite propellants, with increasing amount of different solid fillers. Dynamic Mechanical Analysis (DMA) is performed to determine the region of glass-rubber transition temperature (Tg). Further parameters were obtained from the description of the loss factor curv
J. Aerosp. Technol. Manag.. Publicado em: 2017-09
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3. Diseño de nuevos poliuretanos inspiradospor la estructura macromolecularde la seda de araña
ABSTRACTThis works presents results on the synthesis and characterization of a novel bio-inspired polyurethane (PU) elastomer with high density of hydrogen bonding. The PU were formed by the condensation of 1,6 hexamethylen-diisocyanate with N-methyl diethanolamine (MDEA) and 1,4-butanediol (BD) as components of the elastic and rigid phases, respectively. Th
Matéria (Rio J.). Publicado em: 2015-09
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4. 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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5. Optimization of Polyurethanes for Protection of Flexible Pipes Subject at Abrasion Wear / Otimização de poliuretanos para protetores de linhas flexíveis sujeitos ao desgaste abrasivo
n the last year the Petrobras Company gone self sufficiency of Brazil in the production of petroleum, Its take great effort to achieve technology in the exploration of deeper oil-well offshore. The extraction of petroleum deeper off-shore is make through flexible pipes that has multi layers of metal materials and polymeric materials, connected semi-submersib
Publicado em: 2007
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6. OtimizaÃÃo de poliuretanos para protetores de linhas flexÃveis sujeitos ao desgaste abrasivo / Optimization of Polyurethanes for Protection of Flexible Pipes Subject at Abrasion Wear
n the last year the Petrobras Company gone self sufficiency of Brazil in the production of petroleum, Itâs take great effort to achieve technology in the exploration of deeper oil-well offshore. The extraction of petroleum deeper off-shore is make through flexible pipes that has multi layers of metal materials and polymeric materials, connected semi-submers
Publicado em: 2007
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7. Biofilm formation by Candida species on the surface of catheter materials in vitro.
A model system for studying Candida biofilms growing on the surface of small discs of catheter material is described. Biofilm formation was determined quantitatively by a colorimetric assay involving reduction of a tetrazolium salt or by [3H]leucine incorporation; both methods gave excellent correlation with biofilm dry weight (r = 0.997 and 0.945, respectiv