Tuesday, January 22, 2008

IIT JEE Natural Rubber

Review points

Rubber is a naturally occuring polymer.

It is obtained as latex from rubber trees. It is highly elastic.

It is a polymer of isoprene (2-methyl buta-1,3-diene)

In natural rubber, about 11,000 to 20,000 isoprene units are linked together in a chain like arrangement.

Natural rubber is a thermoplastic. It becomes soft and sticky when heated. It is not hard and tough.

The properties can be modified and improved by the process of vulcanization.

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