Análise qualitativa e quantitativa de compostos de borracha destinados à fabricação de revestimentos de embreagem / Qualitative and quantitative analysis of rubber compounds destined for clutch facings manufacture

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

27/05/2011

RESUMO

In this work it was developed a methodology for qualifying and quantifying rubber compounds destined for facings manufacture. These compounds are formed by a large number of components which use, beyond the elastomeric base, a resin that is used as a process agent, vulcanization agents and different fillers, each one with a specific function. The elastomeric systems are characterized by properties that could be affected by the addition or removal of some ingredient and also by variations in its concentration. The rubber compounds are produced by an outsourced company, so the development of a variety of analytical tools for monitoring these systems is essential, since these compounds are the basis of a facing formulation. For developing this methodology, TG/DTG, FTIR, GC and EDXRF were used as techniques. The first step was an exploratory and a pre-formulation study for a qualitative characterization of each raw material in rubber compound. In the second stage, several samples with known concentrations of the quantifying component were prepared. The quantification of graphite and carbon black was made directly by means of TG/DTG technique. For quantifying the other components, analytical curves of response (FTIR, GC and EDXRF) vs. variation of concentration were elaborated. A strong/perfect and positive correlation between the variables was observed and the equations presented good fit with the linear regression model. By means of the analytical curves it was possible to determine the amounts of unknown concentration rubber compounds.

ASSUNTO(S)

análise qualitativa análise térmica clutch system composto de borracha facing qualitative analysis quantitative analysis revestimento de embreagem rubber compound sistema de embreagem thermal analysis análise quantitativa

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