Abstract

Sheela S. Fernandez¹ and Sam Kunchandy²

Natural Rubber (NR), filled with 2 to 8 phr of nano CaCO3 and 2 phr of linseed oil as an extender were compounded using a two-roll mill and moulded on a compression moulding machine. Effects of filler dosage on the cure and mechanical properties of the NR vulcanizates were examined. Because of the reduction in the size of the nano CaCO3, and the presence of linseed oil as an extender, that helped in the homogenous dispersion of the nano CaCO3, better cure and mechanical properties was observed. The composite with 6 phr of nano CaCO3 and 2 phr of linseed oil showed the optimum properties.

Vulcanizates; Natural rubber; Nano CaCO3; Linseed oil; Mechanical properties

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