Ultrasonic treatment of rubbers breaking down their three-dimensional network is the basis of a novel patented technology of waste rubber recycling. Rubber after ultrasonic treatment can be reprocessed, shaped and revulcanized. This paper presents the results of recent investigations on (i) ultrasonic devulcanization of carbon black (CB) filled natural rubber (NR); (ii) experimental studies on the utilization of waste tire rubber by blending devulcanized ground tire rubber (GRT) with high density polyethylene (HDPE); (iii) development of a macroscopic theoretical model of the devulcanization process and computer simulations; (iv) development and design of a new equipment for continuous devulcanization of vulcanized elastomers.
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