Avaliação de clones de borracha natural crua por ensaios padrão e análise dinâmico-mecânica
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Data
2006-01-01
Autores
Dall'Antonia, Ana C.
Martins, Maria A.
Moreno, Rogério M. B.
Mattoso, H. C.
Job, Aldo Eloizo [UNESP]
Ferreira, Fábio C. [UNESP]
Gonçalves, Paulo S.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Associação Brasileira de Polímeros
Resumo
A qualidade do látex de borracha natural (Hevea brasiliensis) de diferentes clones (RRIM 600, IAN 873, GT 1, PB 235), uma mistura destes clones e uma borracha comercial foi avaliada por ensaios padrões (plasticidade Wallace, PRI, viscosidade Mooney, % de cinzas, extrato acetônico e % de nitrogênio), DMA, DSC e TG. As borrachas estudadas apresentam propriedades competitivas com as da borracha presente no mercado, ficando dentro dos padrões de qualidade exigidos pela norma brasileira e pelo padrão internacional. Entre os clones, o clone RRIM 600 foi o que apresentou o melhor desempenho, principalmente em relação à viscosidade Mooney e ao PRI.
Natural rubber (Hevea brasiliensis) from different clones (RRIM 600, IAN 873, GT 1, PB 235), a mixture made from these clones, and a commercial rubber, have been characterized by DMA, DSC, TGA, and standards methods (Wallace plasticity, PRI, Mooney viscosity, ash percentage, acetonic extract and nitrogen percentage). All the samples studied complied with standard specifications required for application in the rubber industry, and can be used in the rubber industry in blended or unblended forms. Among the clones, the best results of the standards methods were obtained from the RRIM 600 clone, and the blended form of the natural rubber increases its storage modulus.
Natural rubber (Hevea brasiliensis) from different clones (RRIM 600, IAN 873, GT 1, PB 235), a mixture made from these clones, and a commercial rubber, have been characterized by DMA, DSC, TGA, and standards methods (Wallace plasticity, PRI, Mooney viscosity, ash percentage, acetonic extract and nitrogen percentage). All the samples studied complied with standard specifications required for application in the rubber industry, and can be used in the rubber industry in blended or unblended forms. Among the clones, the best results of the standards methods were obtained from the RRIM 600 clone, and the blended form of the natural rubber increases its storage modulus.
Descrição
Palavras-chave
Borracha natural, clone, látex, análise térmica, Natural rubber, clone, latex, thermal analysis
Como citar
Polímeros. Associação Brasileira de Polímeros, v. 16, n. 3, p. 239-245, 2006.