Unit 2

Polymers, in terms of resistant materials means plastics. There are two types of plastics which are: thermoplastics and thermosetting plastics. A thermoplastic is a material that, once produced, can be formed using heat, into a variety of shapes using different forming techniques. e.g. injection moulding or blow moulding. Thermoplastics can be reheated, softened, shaped, reshaped and cooled many times over. They can be recovered and recycled easily.

Thermosetting plastics on the other hand are produced by mixing two components, a resin and a catalyst, together. These are usually in the form of liquids or pastes. Whilst they are apart they remain a liquid or paste…