two formulations
of NR done with the antioxidant IPPD and the other with the mixed
antioxidants composed of antioxidant IPPD and lanthanum (La)
complexd were compared to investigate their protective effects on
the thermo-oxidative aging properties of the rubber. Mechanical
testing, Fourier transform infrared spectroscopy with attenuated total
reflectance (FTIR-ATR), and the Flynn-Wall-Ozawa (FWO)method
were used to study themechanical properties, structure changes and
thermo-oxidative aging kinetics, respectively.