Use of TBzTD as Noncarcinogenic Accelerator for ENR/SiO₂ Nanocomposites: Cured Characteristics, Mechanical Properties, Thermal Behaviors, and Oil Resistance

Table 3

Mechanical properties and % retention of NR, ENR 40, and ENR 40/nSiO₂ nanocomposites.

Mechanical properties	NR	ENR 40		ENR 40/nSiO2
			100/1	100/2	100/3
Tensile strength
Before aging (MPa)	13.4 ± 0.7	4.5 ± 0.5	9.7 ± 0.4	13.5 ± 0.4	10.9 ± 0.4
After aging (MPa)	8.8 ± 0.5	3.5 ± 0.6	7.9 ± 0.8	11.3 ± 1.1	9.5 ± 0.3
Retention (%)	65.7	77.8	81.4	83.7	87.2
M300
Before aging (MPa)	2.4 ± 0.2	1.4 ± 0.2	1.7 ± 0.2	2.2 ± 0.2	2.0 ± 0.1
After aging (MPa)	1.8 ± 0.2	1.2 ± 0.1	1.5 ± 0.1	2.0 ± 0.2	1.9 ± 0.1
Retention (%)	75	85.7	88.2	90.9	95
Elongation at break
Before aging (%)	949.0 ± 26.3	735.5 ± 78.5	906.5 ± 30.1	975.8 ± 38.1	820.3 ± 29.2
After aging (%)	739.6 ± 42.5	692.7 ± 25.1	864.4 ± 24.5	941.5 ± 26.8	808.2 ± 15.5
Retention (%)	77.9	94.2	95.4	96.5	98.5
Tear strength
Before aging (N/mm)	4.6 ± 0.1	3.7 ± 0.2	3.9 ± 0.3	4.4 ± 0.2	3.9 ± 0.2
After aging (N/mm)	4.0 ± 0.2	3.4 ± 0.1	3.7 ± 0.1	4.2 ± 0.2	3.8 ± 0.1
Retention (%)	87	91.9	94.9	95.4	97.4