The chart below is intended to help in the material selection stage of designing rubber parts / products. The processing of synthetic rubbers involves approximately the same steps and equipments as that of crude rubber. Chemical and environmental resistance and mechanical properties are improved through crosslinking (vulcanizing), usually through treatment with sulfur.

There are two types of rubber — Natural Rubber and Synthetic Rubber. Discovered in the early 1700’s, natural rubber material was presented to the Royal Science Academy of France as a valuable resource interest.

Material Reference. Material Notes: Natural rubber is polyisoprene. Properties of natural rubber. The advantages of natural rubber are less buildup of heat from flexing and greater resistance to tearing when hot.

The rubber materials selected by designers and technical buyers should meet all their application requirements.

THE PROPERTIES OF MATERIALS and their everyday uses Children need to have experience of, and explore as many different materials (substances) as possible in order to make sense of their world.

Natural rubber, also called by other names of India rubber, latex, Amazonian rubber, caucho or caoutchouc, as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds, plus water.

MECHANICAL PROPERTIES AND DURABILITY OF NATURAL RUBBER COMPOUNDS AND COMPOSITES Joseph Thomas South (ABSTRACT) The focus of this research was to investigate the effect of thermal degradation upon the mechanical properties of natural rubber compounds and apply those effects to the life prediction of off axis 2-ply cord rubber laminates. Styrene Butadiene Rubber (SBR) is one of the cheaper general purpose rubbers. Pure gum rubber, also known as natural rubber, is the elastomer that started it all.Made out of the coagulated latex produced from the Para rubber tree Hevea brasiliensis, natural rubber has been used as far back as 1600 BCE. With its origins tracing back to the Para rubber tree grown in South America, wide spread appeal of this new viable product appealed to various nations for the unique material properties of rubber. It is made up of solids particles suspended in milky white liquid, called latex that drips from the bark of tropical and subtropical trees.

Natural rubber.

These are the elastomers which are obtained naturally.

Physical Properties of Crude Natural Rubber: The physical properties of crude natural rubber are indicated below: 1.

3.

It is a natural occurring elastomer extracted from the sap of the Hevea Brasiliensis tree grown on plantations. Synthetic rubber is produced artificially from polymers in different varieties to mimic the different properties of natural rubber.