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The word plastic means something that is deformed from its original shape and does not spring back or break. In practice materials often exhibit this behaviour along with others depending on the degree of force used and the prevailing conditions. More generally, in common usage, the term plastic refers to a polymer, which is a material made up of repeated chemical links called mers. Polymer meaning many mers. Paradoxically the generic name plastic is often used to include elastomers which spring back into their original shape. Plastic is normally used to refer to synthetic or man made polymers allthough you can have organic one's like butyl rubber.

Just to show how confusing the language can be, what we call rubber, when we refer to car tyres is a co-polymer of organic butyl rubber (elastomer) and styrene (synthetic polymer) vulcanised for strength. The vulcanizing process introduces sulphur atoms to bind the springy elastomer to the stiff polymer. The raw material that polymers are usually made from is oil but many of them could also be manufactured from materials such as coal or from plants but would most likely be more expensive to manufacture especially as capital costs for production from oil have already been met.

It has been a long time since I did any sort of studying on this subject so if anyone would like to add or correct anything please do so.

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16y ago

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