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

Table 2

Mixing cycle.

Timing and working condition	0–20 minutes	21–40 minutes	24 hours	0–20 minutes	21–40 minutes
	Roller speed = 20 rpm	Roller speed = 20 rpm		Roller speed = 20 rpm	Roller speed = 20 rpm
	Temperature = 50°C	Temperature = 50°C		Temperature = 50°C	Temperature = 50°C
	Water cooling	Water cooling		Water cooling	Water cooling
	Roller gap = 1 mm	Roller gap = 0.1 mm		Roller gap = 0.1 mm	Roller gap = 0.1 mm
Operation	Kneading of natural rubber	Addition of ingredients; 4020, TDQ, zinc oxide, stearic acid, CBS to the kneaded mixture	Cooling of kneaded mixture at room temperature	Addition of predetermined quantity of MWCNTs to NR matrix	Addition of predetermined quantity accelerators; TMT and sulphur