The effect of acetylene black amount, operating pressure and temperature of capillary rheometer on thermal conductivity in natural rubber

ABSTRACT

The effects of the amount of acetylene black on viscosity and thermal conductivity and the effects of operating pressure and temperature of capillary rheometer on thermal conductivity were investigated. Five different natural rubber compounds were prepared as 3NAB, 4NAB, 5NAB, 6NAB and 7NAB, which contain different amounts of acetylene black. Thermal conductivities were measured at different temperatures and pressures. The viscosity of the five compounds was measured and it was found that viscosity increases as the amount of acetylene black increases. Thermal conductivity measurements were performed at different temperatures and pressures by using a capillary rheometer. The obtained results indicated that thermal conductivity increased with the increasing acetylene black. The relationship between thermal conductivity-pressure and thermal conductivity-temperature have also been examined. Additionally, the mechanical properties, electrical conductivity, and thermal stability of the compounds were analysed. The change of these properties with the amount of acetylene black was examined.

KEYWORDS:

• Acetylene black
• capillary rheometer
• filler
• natural rubber
• pressure
• temperature
• thermal conductivity
• viscosity

Acknowledgments

This work was supported by the SAMPA Automotive R&D Center. The use of facilities at Sampa Automotive R&D Laboratory is acknowledged. The authors are grateful to Sampa Automotive R&D Laboratory team members.

Disclosure statement

No potential conflict of interest was reported by the authors.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.