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An elastomer is a polymeric substance obtained after vulcanization of rubber. Vulcanization is the process of improving the properties of rubber by heating with sulphur. A normal rubber is not useable as it becomes brittle at low temperature and sticky at high temperature. Charles Goodyear had been trying to 'cure' the rubber so that it could be used in all seasons. He tried to mix all kinds of things such as ink, black pepper, cheese and what not. But he couldn't succeed until he dropped a piece of rubber on stove accidentally.
To his surprise, he found that instead of melting the rubber piece hardened and remained pliable. It was found in the lab that it contained traces of sulphur. Goodyear perfected the process and named it 'vulcanization' after the Roman God of fire, 'Vulcan'.
What is the Long Term Effects - Concrete Long term effects of loads on structures consider all the effects including creep and shrinkage.
Find the Youngs modulus of the rod: A composite rod is made by joining a copper rod end to end with a second rod of different material but of same cross-section. At 25oC, the
The objective of this module is:- - For the student to identify the track design issues and there relationships that will need to be considered in the development of a feasibili
types of windows
Question: What are dissimilar applications of draglines, backhoes and shovels? Answer: An excavator is distinct as a power-operated digging machine and it includes di
Q. Explain about Overhauling of Level xing? Each level crossing except those laid with PSC sleepers must be opened out and the condition of sleepers and fittings, rails and fas
Modes of failure • For safe design, a knowledge of the possible modes of failure is also necessary, e.g. failure of the structure could occur due to - Tensile fracture due t
Explain the term - Circular Prestressing This term refers to the case when tendon profile is provided in a round shape, such as in water tanks and pipes, etc.
Aim,materials or tools required,procedure for constructing english bond bricks
Q. Maintenance of steel bearings? Cleaning and greasing of bearings is one of the important maintenance works to avoid premature failure of bearings and reduce recurring heavy
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