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Polímeros

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

Resumo

INTAWONG, Naret; UDOMSOM, Sittichai; SUGTAKCHAN, Konnatee  e  SITTICHAROEN, Watcharin. Influence of flow pattern development at die entrance and inside annular die on extrudate swell behavior of NR compound. Polímeros [online]. 2015, vol.25, n.5, pp.508-513. ISSN 1678-5169.  http://dx.doi.org/10.1590/0104-1428.2021.

This research studies influence of the flow pattern at annular die entrance through the inside of annular die flow channel of capillary rheometer on the swell behavior of NR compound. The annular die used in this research was specifically designed to create the specific pattern of Vortex Flow at Die Entrance (VFE) of NR compound. Results of the study showed that the thickness swell ratio was higher than diameter swell ratio by an average of 20% at every die gap size. It was also found that the VFE flow pattern had direct significant influence on the swell behavior of NR compound while extrudating through annular die. Results from the study of the flow pattern could be used to explain why the thickness swell ratio is higher than the diameter swell ratio in every test condition.

Palavras-chave : capillary rheometer; annular die; diameter swell ratio; thickness swell ratio; NR compound.

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