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Chemistry Open Book Aswani Pillai 6L3 07-05-2006 1) Natural rubber is a polymer that is readily synthesised from specific plants. All the chemical reactions have taken place in the plant, and the rubber is extracted, in the form of latex; a sticky substance. Latex, like synthetic rubber, has polymer chains, produced by means of additional polymerisation, which occurred inside the plant. However, natural rubber cannot be used by itself, to make tyres due to its thermoplastic nature. Thermoplastic means materials melting when reheated, as the polymer chains run by each other, as they are not held in place. Synthetic rubber has no such limitations, as they are manufactured and produced with desired thermoset properties, meaning that they will not melt when reheated. A key difference of natural rubber, to synthetic, is that it is restricted, as it can only come from select countries, but synthetic rubber is manmade. ...

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