Yang Meng, Liu Bin, Zhu Zongsheng, et al. Analysis of Torsional Tensile Thermal Effect of Natural Rubber at Different Temperatures[J]. Journal of refrigeration, 2022, 43(1).
DOI:
Yang Meng, Liu Bin, Zhu Zongsheng, et al. Analysis of Torsional Tensile Thermal Effect of Natural Rubber at Different Temperatures[J]. Journal of refrigeration, 2022, 43(1). DOI: 10.3969/j.issn.0253-4339.2022.01.011.
Analysis of Torsional Tensile Thermal Effect of Natural Rubber at Different Temperatures
Thermoelastic refrigeration is a solid-state technology that produces a refrigeration effect by driving the phase change of thermoelastic materials with a stress field. Natural rubber has attracted much attention because of its price and low elastic modulus. In this study
vulcanized natural rubber was subjected to a stretching-twisting-untwisting-retraction cycle at an ambient temperature above 0 °C to eliminate the Mullins effect. Natural rubber with the Mullins effect was subjected to cyclic loading in the ambient temperature range of -30–40 ℃. The temperature change of natural rubber during the cycle was recorded using an infrared thermal imager to explore the influence of temperature on the torsional tensile thermal effect. It was found that the temperature change of natural rubber during the twisting-untwisting process is greater than that in the simple stretching-retraction process. The temperature change is the highest due to the low-temperature crystallization characteristics of rubber at an ambient temperature of -20 ℃. The temperature during unloading reaches -41.3 ℃.