Abstract
The recycling of organic by-products has attracted much interest. In this paper, the technique which uses carbon materials produced from an organic by-product as a reinforcer of synthetic rubber is described. The organic by-products, coffee grounds, chaff and residue of Japanese spirits distilled from sweet potatoes, were carbonized at different carbonization temperatures. The carbon materials and carbon black are used for conventional synthetic rubber as the reinf orcer. The Mooney viscosity, the optimum vulcanization time, the hardness, the tensile strength, the tear strength, the compression set percentage and the permanent set of the carbon materials were measured to estimate the properties of synthetic rubber. The strength of the rubber produced with the carbon materials was weaker than that produced with the carbon black. However, the carbon materials can still be utilized as a reinf orcer of rubber.
