Rubber Emissivity and the Thermal State of Tires

Browne, Alan L.; Wickliffe, L. E.

doi:10.2346/1.2151015

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…The mean average temperature of a rectangle covering a pixel area of about 225 pixels was used to track and measure the temperature in the center of the specimen during straining and retraction using the FLIR Research IR software. The emissivity was set to 0.95 which is a reasonable approximation for CB reinforced rubber (Browne and Wickliffe, 1979;Luukkonen et al, 2009). The ambient room temperature was measured by placing a black body in the view of the camera and this was verified with a standard thermocouple.…”

Section: Experimental Methodsmentioning

confidence: 99%

Thermomechanical Characterization of Carbon Black Reinforced Rubbers During Rapid Adiabatic Straining

Kyei-Manu¹,

Tunnicliffe²,

Plagge³

et al. 2021

Front. Mater.

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The thermo-mechanical properties of carbon black reinforced natural and styrene butadiene rubbers are investigated under rapid adiabatic conditions. Eleven carbon black grades with varying surface area and structure properties at 40 parts per hundred (phr) loading are studied and the unreinforced equivalents are included for reference. The results show a strong correlation of the modulus, mechanical hysteresis, temperature rise and calculated crystallinity of the rubbers measured in tensile extension with strain amplification factors. This highlights the influence of matrix overstraining on microstructural deformations of the rubber upon extension. The strain amplification factors are calculated via the Guth-Gold equation directly from carbon black type and loading, allowing a correlation of the fundamental morphological properties of carbon black with thermal and mechanical properties of rubbers upon extension. Analysis of the thermal measurements of the rubber compounds upon extension and retraction and contrasting between crystallizing and non-crystallizing rubbers reveals that a substantial irreversible heat generation is present upon extension of the rubber compounds. These irreversible effects most likely originate from microstructural damage mechanisms which have been proposed to account for the Mullins Effect in particle reinforced rubbers.

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Section: Experimental Methodsmentioning

confidence: 99%