what is rubber made of
Rubber is the name of a material which can stretch and shrink. It is a polymer. It can be either produced from natural sources (eg. natural rubber) or can be synthesised on a industrial scale. Lots of things are made from rubber, like gloves, tires, plugs, and masks and a few things can be made only from rubber. Natural rubber (latex rubber) is made from the white sap of some trees. There is a lot of it in the Hevea brasiliensis (Euphorbiaceae). Nowadays, synthetic rubber is made by a chemical process.