The Effect of High Loaded Multiwall Carbon Nanotubes in Natural Rubber and Their Nonlinear Material Constants

Table 3

Parameters measured from rheology tests.

	Min. torque (ML)	Max. torque (MH)	Induction time (tS2) Hr : minute	Scorch time (tS5) Hr : minute	Optimum cure time 50% (tc50) Hr : minute	Optimum cure time 90% (tc90) Hr : minute	Cure rate (CR)	Difference in torque (MH-ML)
Unfilled NR	3.21	66.11	1 : 50	2 : 13	2 : 53	3 : 59	0.775	62.9
5 phr MWCNT filled NR	3.53	81.19	1 : 35	1 : 51	2 : 24	4 : 01	0.685	77.66
10 phr MWCNT filled NR	9.63	92.42	1 : 06	1 : 16	1 : 41	3 : 02	0.862	82.79
20 phr MWCNT filled NR	29.36	138.64	1 : 10	1 : 18	1 : 43	2 : 58	0.926	109.28
30 phr MWCNT filled NR	51.83	127.08	1 : 22	1 : 26	1 : 46	3 : 19	0.854	75.25