Elastomers
Mostrando 13-24 de 70 artigos, teses e dissertações.
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13. Fechamento de grandes feridas com fita elástica de borracha em coelhos
OBJETIVOS: verificar a eficácia da fita elástica de borracha no tratamento de grandes feridas de parede corpórea de coelhos por meio da tração de suas bordas. MÉTODOS: foram estudados 30 coelhos da raça Nova Zelândia, distribuídos em três grupos (n=10): Grupo 1. Cicatrização por segunda intenção. Grupo 2. Retirada e reposicionamento eutópico
Rev. Col. Bras. Cir.. Publicado em: 2015-02
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14. The use of atomic force microscopy as an important technique to analyze the dispersion of nanometric fillers and morphology in nanocomposites and polymer blends based on elastomers
AFM has been recognized as one of the most powerful tools for the analysis of surface morphologies because it creates three-dimensional images at angstrom and nano scale. This technique has been exhaustively used in the analyses of dispersion of nanometric components in nanocomposites and in polymer blends, because of the easiness of sample preparation and l
Polímeros. Publicado em: 2014-12
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15. Thermoplastic elastomers blends based on linear low density polyethylene, ethylene-1-octene copolymers and ground rubber tire
Blends of linear low density polyethylene (LLDPE) ethylene-1-octene copolymers (EOC), with different 1-octene (OC) content, and ground rubber tire (GRT) were prepared by melt mixing in a twin screw extruder. Five different compositions of LLDPE/EOC/GRT blends were processed in the extruder to evaluate the effect of EOC addition to the LLDPE/GRT blends. The a
Polímeros. Publicado em: 2014
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16. Infrared Spectroscopy Applied to Materials Used as Thermal Insulation and Coatings
ABSTRACT: It is very important to control the characteristics of a polymer used in rubber compositions and paints in aerospace applications. Hence, the development of simple and fast methodologies that allow the identification of these compositions becomes attractive to researches carried out in this area. This study has evaluated infrared (IR) techniques, s
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
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17. Thermal & morphological evaluation of linear and radial SEBS-polypropylene blends
Blending of two or even more immiscible polymers is a very useful method to obtain new polymeric materials with ordered and tailored properties. Thermoplastic elastomers (TPE's) are interesting materials for various applications, including the automotive industry, due to their excellent balance between processability and physical properties, especially using
Polímeros. Publicado em: 25/10/2013
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18. Effect of different disinfecting procedures on the hardness and color stability of two maxillofacial elastomers over time
Objective Disinfection procedures often cause deterioration in a maxillofacial prosthesis. Color and hardness alterations could lead to a replacement of the prosthesis. Material and Methods An experimental chlorinated polyethylene (CPE) and a commercial polydimethyl siloxane (PDMS) sample were treated with four different disinfection procedures for a perio
J. Appl. Oral Sci.. Publicado em: 2013-06
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19. Correlação estrutura-propriedades de silicones para prótese facial - Efeitos da pigmentação e do envelhecimento / Correlation structure-properties of silicones for facial prosthesis - Effects of pigmentation and aging
Este estudo avaliou a dureza Shore A, alteração de cor, recuperação elástica e resistência ao rasgamento de um silicone experimental (Ortho Pauher - O), quando comparado a um silicone usado em reabilitações faciais (MDX 4-4210 - MDX), quando submetidos à pigmentação e envelhecimento e ainda, analisou a micro estrutura desses materiais. Para análi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2012
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20. In vitro study of cytotoxicity of orthodontic elastomeric ligatures
This study investigated the cytotoxicity of crystal-coloured orthodontic elastomeric ligatures of polyurethane. Six ligatures from distinct manufactures were divided into 6 groups of 10 elastics each: Groups P1, P2, P3, P4, P5 and P6 (Polyurethane). The cytotoxicity essay was performed using L-929 line cells, which were submitted to the cell viability test w
Materials Research. Publicado em: 26/06/2012
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21. Thermal and rheological behavior of reactive blends from metallocene olefin elastomers and polypropylene
Reactive blends of metallocene polyolefin elastomers (POE)/polypropylene (PP) with 60/40 composition were prepared with an organic peroxide, 2,5-dimethyl-2,5-di-(t-butylperoxy)hexane, and a bis-azide derivative, diphenyloxid-4,4'-bis(sulfonylazide) (BSA). Ethylene-1-butene (EB) and ethylene-1-octene (EO) copolymers and elastomeric polypropylene (ePP) were us
Polímeros. Publicado em: 05/06/2012
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22. Tenacificação de polipropileno com elastômeros olefínicos para aplicações com requisitos de transparência ótica / Polypropylene toughness with olefinics elastomers for applications with transparency needed
O polipropileno é um polímero bastante versátil porém apresenta deficiência no que tange resistência ao impacto. A tenacificação do polipropileno é obtida através da adição de elastômeros que acaba por reduzir a rigidez da blenda. Muitos estudos já abordaram a eficiência de modificação de impacto diferentes elastômeros normalmente base etil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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23. 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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24. Avaliação das propriedades físicas de dois materiais flexíveis de produção nacional para uso em prótese facial / Evaluation of the physical properties of two flexível materials domestic produced, to create facial prosthesis
Para confeccionar próteses faciais e reabilitar aqueles pacientes com perdas anatômicas, são empregados diversos materiais, destacando-se entre estes os flexíveis,devido á semelhança estética que apresentam com a pele humana. O padrão de qualidade dos materiais é liderado por produtos estrangeiros, tornando difícil a obtenção e, por tanto, a apli
Publicado em: 2011