Effect of egg shells powder on some mechanical and physical properties of natural rubber (NR)‎

الملخص EN

In this research, the effect of egg shells powder on some mechanical and physical properties of natural rubber, that comprised each of tensile strength, modulus of elasticity, elongation, hardness, resilience and specific gravity, were studied.

The egg shells were collected and dried by exposed to sun for (3) days and they were milled by electrical mill, the set of sieves were employed to get on egg shell powder by the suitable size.

The egg shell powder was added to NR from 5 wt % to 25 wt % and then tensile, hardness, resilience and specific weight tests were carried out for prepared specimens.

The results showed that the hardness and modulus of elasticity, specific weight increased with increasing of the powder.

The hardness was (35 IRHD) for pure rubber, while was (49.3 IRHD) at percent of powder (25 wt %).

It was observed that the tensile strength, elongation and resilience decreased with increasing of powder.

The tensile strength was (21.96 MPa) for pure rubber, while was (9.21 MPa) at percent of powder 25 wt %.

This work exists with a good replacement for synthetics fillers avoiding their toxicity and their highly cost and reducing of the environmental pollution.