Acrylic Rubber
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Compatibilization efficiency of carboxylated nitrile rubber and epoxy pre-polymer in nitrile/acrylic rubber blends
An investigation has been made of the effects from a compatibilizer, viz. carboxylated nitrile rubber (XNBR), on several properties of nitrile rubber (NBR) and acrylic rubber (ACM) blends, including curing characteristics, mechanical, dynamic mechanical and dielectric properties. The presence of XNBR until 10 phr resulted in an improvement of the ultimate te
Polímeros. Publicado em: 05/04/2013
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2. Caracterização da relaxação por compressão de borracha acrílica irradiada. / Compression relaxation characterization of irradiated acrylic rubber.
Este trabalho tem como objetivo investigar a redução da relaxação por compressão de borracha acrílica modificada (ACM) irradiada por feixe de elétrons, através da caracterização de seu comportamento mecânico e de sua estrutura molecular. O material, nas condições original e irradiado, foi inicialmente submetido a ensaios uniaxiais de tração e
Publicado em: 2011
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3. In vitro evaluation of the precision of working casts for implant-supported restoration with multiple abutments
OBJECTIVE: The purpose of this study was to compare the accuracy of two working cast fabrication techniques using strain-gauge analysis. METHODS: Two working cast fabrication methods were evaluated. Based on a master model, 20 working casts were fabricated by means of an indirect impression technique using polyether after splinting the square transfer coping
Journal of Applied Oral Science. Publicado em: 2007-06
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4. In vitro analysis of the degradation of the orthodontics rubber bands tensile strength in function of the quantity of activation / Análise in vitro, da degradação de forças dos anéis elásticos ortodônticos em função da quantidade de ativação.
The objective of this research is to analyze the quantity of degradation of the orthodontics rubber bands tensile strength in relation to different intensities of tivation twice, three times and four times their diameter in a relaxed state; the quantity and the level of degradation of the rubber bands tensile strength in relation to different commercial bran
Publicado em: 2007
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5. Propriedades mecanicas de resinas acrilicas para base de protese antes e apos metodos de reparos / Mechanical properties of denture base acrylic resins before and after repair methods
Fractures by impact and flexural action are the main problems described by denture users and dentists. Attempting to solve this problem, modifications on the chemical composition of the acrylic resins as co-polymer inclusion, cross linking agents addition and rubber particles incorporation in the form of butadiene styrene have been described as effective and
Publicado em: 2006
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6. Efeito da escovação mecanica e da termociclagem sobre dureza e rugosidade superficiais de reembasadores resilientes / Effect of mechanical brushing and ageing by thermal cycling on hardness and roughness surface of resilient soft liners
The aim of this study was to evaluate the effect of mechanical brushing and thermocycling on hardness and roughness of three resilient definitive lining materials: 1) auto (Sofreliner MS), 2) heat-polymerized (Molloplast-B) silicone bases; and 3) auto-polymerized plasticized acrylic resin (Dentuflex). To prepare the samples, silicone rubber matrixes were mad
Publicado em: 2005
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7. Inclinação dental em protese total em função de diferentes tecnicas de inclusão
The purpose of this study was to evaluate first molar inclination in maxillary and mandibular complete dentures processed in monomaxilary and bimaxillary flasks by microwave irradiation (at 20 % power for 20 minutes and 60% power for 5 minutes). Forty pairs of type-III-stone models were obtained, and complete dentures were waxed and standardized with a speci
Publicado em: 2004
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8. Propriedades mecanicas e termicas, morfologia e reologia de blendas de poliamida-6 e elastomeros
Blends of polyamide-6 (PA-6) and elastomers is the central subject of this thesis. The work can be subdivided in three parts according to the type of rubber used, each part has specific objectives. In the first part, the mechanical properties and phase morphology of ternary blends of polyamide 6 with rubber, e.g., maleated ethylene-propylene random copolymer
Publicado em: 1999
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9. Influencia de tecnicas de polimerização sobre adaptação das bases de protese total
The purpose of this study was to veri1)1 the denture bases accuracy, made with heat-cured acrylic resin, occurred under the influence of three cycles of polymerization: conventional, by dry heat and with microwave. energy. Thirty master cast were made in stone plaster from a rubber cast, representing a normal nondental arch. The experimental bases were made
Publicado em: 1998
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10. Blendas de poli (metacrilato de metila-co-metacrilato de glicidila) e poli (butadieno-co-acrilonitrila)
Blends of poly(butadiene-co-acrylonitrile) (NBR) and poly(methyl methacrylate-co-glycidil methacrylate) P(MMA-co-GMA) were prepared aiming analysing its phase behavior and characterizing these materiaIs by their structural, thermal mechanical thermo-mechanical and morphological properties as a function of NBR composition and crosslinking degree. P(MMA-co-GMA
Publicado em: 1995
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11. Improved chamber for the isolation of anaerobic microorganisms.
A small portable chamber for the recovery of anaerobic bacteria is described. This rigid chamber is constructed of clear acrylic with dimensions of 30 inches (ca. 76.2 cm) wide, 18 inches (ca. 44.7 cm) deep, and 18 inches (ca. 44.7 cm) high. Conventional bacteriological techniques can be used inside the chamber to efficiently isolate strict anaerobic organis