Improving the Thermal Aging Resistance of γ-Vulcanized Polybutadiene Rubber (BR)/Nature Rubber (NR) Blends with Sulfur Added

Table 5

Thermal stability parameters of the BR/NR blends.

		IDT	Tmax (°C)	Et (kJ/mol)
Before aging	50 kGy	231.6	396.7	71.1
	100 kGy	244.9	400.3	73.7
	150 kGy	249.6	408.6	74.3
	200 kGy	251.8	407.1	77.7
	250 kGy	262.5	411.6	82.3
After aging	50 kGy	272.8	393.3	84.0
	100 kGy	273.5	400.5	85.3
	150 kGy	275.3	408.3	85.8
	200 kGy	282.3	409.2	87.1
	250 kGy	281.9	408.2	84.8