SciELO - Scientific Electronic Library Online

 
vol.20 número5Espumados magnetizáveis úteis em processos de recuperação ambientalNitrile rubber - based nanocomposites prepared by melt mixing: effect of the mixing parameters on mechanical, dynamic-mechanical and creep behavior índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428

Resumo

OLIVEIRA, Iara T. D. de et al. Effect of a new accelerator of vulcanization in the rheometric properties of nitrile rubber compositions with different AN amounts. Polímeros [online]. 2010, vol.20, n.5, pp.366-370.  Epub 10-Dez-2010. ISSN 0104-1428.  https://doi.org/10.1590/S0104-14282010005000059.

The effect of the type of accelerator on the vulcanization process of nitrile rubber compounds with two acrilonitrile amounts was investigated. Two commercial accelerators benzothiazole (MBTS) and zinc dimethyldithiocarbamate (ZDMC), from different chemical groups, thiazole and dithiocarbamate, respectively, were selected and compared with the compound bis (4 methylphenylsulfonyldithiocarbimato-)zincate (II) of tetrabutylammoniun (ZNIBU). The results show that the type of accelerator not only affects the cure characteristics, but also has great influence on the physical properties. Among the accelerators studied, MBTS was found to be the least adequate for the formulation used as far as rheometric parameters are concerned. Surprisingly, it was found that ZNIBU showed an intermediate behavior, being more efficient than MBTS but not as much as ZDMC, considered an ultra accelerator, as for the optimum cure time.

Palavras-chave : Dithiocarbimates; zinc complexes; nitrile rubber; vulcanization.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons