This chapter provides an up-to-date account of reuse, recycling
and devulcanization of natural and synthetic isoprene rubbers. Landfilling
and waste utilization, grinding and pulverization, high pressure high
temperature sintering, pyrolysis, microwave, ultrasonic, chemical,
mechanochemical and biochemical devulcanization are discussed. Attention
is paid to properties of the products made from recycled and devulcanized
rubbers. Blending of natural and isoprene rubbers with virgin rubbers is
discussed. Structural changes occurring in rubbers during devulcanization are
elucidated. The importance of recycling of rubbers without adding chemicals
for their devulcanization and reuse of devulcanized rubbers in a factory floor
are stressed. Future trends in rubber recycling are discussed.