Abstract
The main objective of this chapter is to provide the up-to-date account on recycling of used tires and waste rubbers including existing methods and emerging technologies of grinding, reclaiming, and devulcanization, and also the possibility for recycled rubber utilization into products. Rubber devulcanization is a process in which scrap rubber or vulcanized waste product is converted, using mechanical, thermal, or chemical energy, into a state in which it can be mixed, processed, and vulcanized again. Devulcanization is a process that causes the breakup of the chemical network along with the breakup of the macromolecular chains. Numerous methods have been applied in an attempt to solve the problem and to find more effective ways of tire rubber recycling and waste rubber utilization. These methods include retreading, reclaiming, grinding, pulverization, microwave and ultrasonic processes, pyrolysis, and incineration. Processes for utilization of recycled rubber are also being developed, including the use of reclaimed rubber to manufacture rubber products and thermoplastic rubber blends.
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