Main Properties Exhibited by Ebonites

Whether used for mechanical or chemical engineering application, ebonite should not soften and yield under pressure at an unduly 

In metals the above phenomenon manifests as shown in figure 3.1 [7]. For instance, when a vertical metallic bar is subjected to a load p for a given period of time to it produces an elongation equal to 8o which is the yield point. Subsequent to the time to if the load is kept constant or without further application and the time duration increased, the bar gradually and slowly lengthens. Since this extension takes place only in a portion of the sample 

A well compounded ebonite free from carbon black and hygroscopic ingredients and with its surface in a clean condition has a very high resistivity both through the mass of the material, and over its surface. It is so far above what is required for most practical purposes that it is seldom necessary to measure these properties, especially in cases of electroplating tanks lined with ebonite required in most steel plants. 

The diffusion of water into a mass of ebonite is so slow that the water absorbed affects only the material at the surface. In practice the degree of absorption would require many months or even years to complete on continuous exposure to water or dilute liquids. 

While considering swelling characteristics of ebonite two facts are noteworthy 1) high sulphur and adequate cure reduce both the 

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