Abstract
This work presents a novel waste tire rubber reclamation method using supercritical carbon dioxide (ScCO2) jet pulverization. The particle size distributions of the acquired ground tire rubber were analyzed and the rubber devulcanization behaviors were investigated. Results show that devulcanized ground tire rubber with fine particle size and coarse surfaces can be acquired in ScCO2 jet pulverization. The rubber swelling in ScCO2 significantly impedes fine pulverization. The jet impact mainly results in main chain scission, while long reaction time and low jet pressure are beneficial for the selective breakage of crosslinks. It indicates that ScCO2 jet pulverization can be an excellent choice for WTR reclamation concerning both size reduction and rubber devulcanization.
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