Topic
Mooney viscosity
About: Mooney viscosity is a research topic. Over the lifetime, 1716 publications have been published within this topic receiving 11032 citations.
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TL;DR: In this paper, the effects of a silane coupling agent on curing characteristics and mechanical properties of bamboo fiber filled natural rubber composites were studied, and the results showed that the composites improved tensile strength, tear strength, hardness and tensile modulus with the addition of Si69.
264 citations
TL;DR: In this paper, the authors investigated the effect of epoxidized natural rubber (ENR) as a compatibilizer for a silica-reinforced NR tire tread compound.
162 citations
TL;DR: In this article, the effect of recycled rubber powder (RRP) on cure characteristics, tensile properties and swelling behaviour of natural rubber (NR) compounds was investigated in the concentration range of 0 to 50 phr.
97 citations
TL;DR: In this paper, the authors focused on the recycling of natural rubber industry waste by means of thermo-mechanical devulcanization, and evaluated the extent and quality of the resulting material through the measurements of crosslink density, soluble fraction and Mooney viscosity.
Abstract: This work is focused on the recycling of natural rubber industry waste by means of thermo-mechanical devulcanization. With that aim, tests were carried out in an industrial twin-screw extruder, at different barrel temperatures, ranging from 80 to 220 °C. The extrusion was done with a screw profile specifically designed for the devulcanization process. The extent and quality of devulcanization were evaluated through the measurements of crosslink density, soluble fraction and Mooney viscosity, and by using the Horikx diagram. Results showed that a high degree of reclaiming (˜90%) was obtained, independently of the barrel temperature. The samples with the best devulcanization quality, i.e. the samples with a more selective sulfur bond scission, were found to be those treated at a lower input temperature. This was explained by the effect of the rubber homogenous self-heating which contributes to the local increase of the material temperature, during the devulcanization process. Moreover, it was found that the properties of the devulcanized rubber/virgin rubber blends were not significantly affected by the addition of the treated rubber. Results suggest that the entire natural rubber industry waste could be recycled into new competitive products, with low energy consumption. This would present a real contribution to the industrial recycling and thus a noticeable improvement of the environment.
94 citations
TL;DR: In this paper, the authors studied the rheological behavior of fillers in terms of the filler composition of natural rubber compounds with both carbon black and silica (Carbon black/silica = 60/20,40/40, and 20/60 phr).
Abstract: Rubber compounds are reinforced with fillers such as carbon black and silica. In general, filled rubber compounds show smooth rheological behaviour in measurement of Mooney viscosity or Mooney scorch time. Variation in rheological behaviour was studied in terms of the filler composition using natural rubber compounds filled with both carbon black and silica (carbon black/silica = 60/20,40/40, and 20/60 phr). The compound filled with carbon black/silica of 60/20 phr showed normal rheological behaviour. However, the compounds filled with carbon black/silica of 40/40 and 20/60 phr showed abnormal rheological behaviour, in which the viscosity increased suddenly and then decreased at a certain point during the measurement. The abnormal behaviour was explained by the strong filler–filler interaction of silica. Moreover, the abnormal rheological behaviour was displayed more clearly as the storage time of compounds is increased.
© 2003 Society of Chemical Industry
90 citations