SciELO - Scientific Electronic Library Online

 
vol.17 número2Caracterização mecânica de polipropileno reciclado para a indústria automotiva índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

PASSADOR, Fábio R.; PESSAN, Luiz A.  e  RODOLFO JR., Antonio. PVC/NBR blends by reactive processing I: in situ dynamic vulcanization process. Polímeros [online]. 2007, vol.17, n.2, pp.80-84. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282007000200004.

Dynamic vulcanization is a process of vulcanization of an elastomer during melt mixing with a thermoplastic wich results in material called thermoplastic vulcanizates or TPVs. In this study, a new kind of TPV was obtained by in situ dynamic curing of poly(vinyl chloride) (PVC)/nitrile rubber (NBR) blends. The crosslinking of PVC/NBR blends was accomplished using sulphur (S)/tetramethylthiuram disulphide (TMTD) and mercaptobenzthiazyl disulphide (MBTS) curative system during the reactive processing. The blends of PVC/NBR at the ratio of 90/10; 80/20 and 70/30 wt. (%) were melt mixed using a Haake Rheomix 600 at 160 °C and rotor speed of 60 rpm. The curing behavior of NBR was investigated by a Monsanto Rheometer and the degree of cure was calculated using differential scanning calorimetry (DSC) for different mixing times. It was observed that the degree of cure increases with the mixing time and the crosslinking system used in this work was considered efficient.

Palavras-chave : Dynamic vulcanization; poly (vinyl choride); nitrile rubber; reactive processing; PVC/NBR blends.

        · 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