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Can we use a better polymer? A polymer is a term used to describe large molecules consisting of repeating structural units, or monomers. The word derives from the Greek words poly (many) and meros (parts) - (many parts). There are two types of polymers - natural and synthetic. Examples of natural polymers include:- DNA, skin, hair and keratin. Examples of synthetic polymers include:- plastic, nylon, polyethylene and polystyrene. The Chain Structure of a Polymer Synthetic polymers are made by reacting together small molecules called monomers. When the monomers join together they form a polymer. We make polythene by joining together molecules of ethene. The main properties for a material are: * Strong * Tough * Flexible * Tension * Soft * Density You could test a material for a specific property in many ways, for a carrier bag you could put in various weights to see how much the bag can hold without the handles snapping or the bottom of the...

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