Abstract
This research investigates the influence of combined waste oils process variables, including the mass ratio of waste engine–cooking oil (WECO), medium reaction temperature for a constant reaction time, and waste tire rubber (WTR) mesh size, on the chemical properties, rheological properties, and thermal behavior of combined waste oil devulcanized WTR. The samples' chemical elements and bonding energy changes were characterized and their sol friction, thermal behavior, morphology, and rheological properties were analyzed. Different proportions of mixed WECO can devulcanize WTR under medium temperature. WECO with increased reaction temperature and waste engine oil improves WTR's devulcanization (mesh size: 80). The waste oil content significantly increased the WTR morphology quality and reduced its surface roughness. The de-crosslinked structure produced compound structural changeover. Thus, the rheological effects were significant. For devulcanized waste rubber engine–cooking oil, G* decreased gradually and δ° increased progressively, and its anti-fatigue performance increased as the fatigue factors decreased G* sin δ°.
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