| 總結: | The ageing of sidewall rubber compound was studied under ambient temperature over
seven weeks. Results showed significant increase in mooney viscosity, RPA (G’ at 1%)
and RPA (G’ at 100%) over ageing time (p <0.005). Aging sidewall compound for seven
weeks did not cause any significant decrease in structural integrity in the rheometer
properties, tensile, elongation, modulus, hardness, rebound and RPA (tanD at 10%).
Longer time required to see the physical changes during ageing of sidewall compound.
Thus, this study should be repeated using accelerated ageing process to see what is the
significant changes in the physical properties during sidewall rubber compound ageing
process.
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