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Storage hardening of reclaimed rubber is a major problem for many industrialists who
manufacture reclaimed rubber. In this project the cause for storage hardening of
reclaimed rubber was investigated through four major test methods. The Mooney
viscometer was used to measure the change in viscosity for aged and unaged
samples of reclaimed rubber samples. Accelerated storage hardening test was used to
accelerate the hardening of reclaimed rubber, through which change in viscosity,
plasticity etc were discussed. Chloroform extractions were carried out to study the
change in unbound rubber particles present in reclaimed rubber, when subjected to
accelerated storage hardening. IR spectrophotometer was used to get IR spectra to
studystructural change in rubber molecules.
Slight decrease in plasticity and viscosity were observed, when some
additives were added to reclaimed rubber. These results indicate that additien of
additive to reclaimed rubber may have some effect storage hardening of reclaimed
rubber.
Results of tensile properties have shown that these additives have no effect
on tensile properties of reclaimed rubber, because small quantities of additives were
used
