Use este identificador para citar ou linkar para este item:
https://locus.ufv.br//handle/123456789/21697
Tipo: | Artigo |
Título: | Syntheses, crystal structure and spectroscopic characterization of bis(dithiocarbimato)zinc(II) complexes: A new class of vulcanization accelerators |
Autor(es): | Cunha, Leandro Marcos Gomes Rubinger, Mayura Marques Magalhães Oliveira, Marcelo Ribeiro Leite Tavares, Eder do Couto Sabino, José Ricardo Pacheco, Elen Beatriz Acordi Vasques Visconte, Leila Léa Yuan |
Abstract: | The compounds (Ph4P)2[Zn(RSO2N = CS2)2] [Ph4P+ = tetraphenylphosphanium cation; R = CH3 (1b), CH3CH2 (2b), CH3(CH2)3 (3b) and CH3(CH2)7 (4b)] were synthesized by the reaction of RSO2N = CS2K2·2H2O (1a–4a) with Zn(CH3COO)2·2H2O and Ph4PCl. The IR data were consistent with the formation of bis(dithiocarbimato)zinc(II) complexes. The NMR spectra showed the expected signals for the cation and the dithiocarbimate anionic complex in a 2:1 proportion. The compound 3b was also characterized by X-ray diffraction in the triclinic P1¯ space group, with the Zn atom in a general crystallographic position, being coordinated by four sulfur atoms in a distorted tetrahedral coordination environment. The activity of compounds 1b–4b in the vulcanization of the natural rubber was evaluated and compared to the commercial accelerators CBS, MBTS and TMTD. These studies confirm that the bis(dithiocarbimato)zinc(II) complexes are new vulcanization accelerators, showing a similar degree of cure as MBTS, and scorch time values compatible with good processing safety for industrial applications. |
Palavras-chave: | Dithiocarbimates Zinc complexes Vulcanization New accelerators |
Editor: | Inorganica Chimica Acta |
Tipo de Acesso: | Elsevier B.V. |
URI: | https://doi.org/10.1016/j.ica.2011.11.002 http://www.locus.ufv.br/handle/123456789/21697 |
Data do documento: | Mar-2012 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
artigo.pdf Until 2100-12-31 | Texto completo | 453,24 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.