|
Answer» 1. Thermoplastic: As these plastic are soften on heating, they can be recycled, reused, coloured, melted and moulded into different shape. Some thermoplastic and their uses are mentioned below: (a) FVC: one of the most commonly used plastic is PVC (polyvinyl chloride). PVC is used as a building material and to make enclosure for electronic item. (b) Teflon: Teflon is a scratch proof, corrosion-resistant plastic, which is used to provide protective covering to materials. (c) Polyethylene (PE): It has a wide range of inexpensive uses that include making supermarkets bags, plastic bottle, packing material for milk, and some other liquid. (d) Polystyrene (PS): It is used for making disposable untensils, food container, cover for CD and cassettes. 2. Thermosetting: Such plastic once moulded cannot be heated and recanted into another. Some thermosetting plastic are: (a) Bakelite: Bakelite is used for making plugs, sockets, switches and other electrical fitting. (b) Melamine: It is used for making unbreakable kitchenware. Melamine plastic is also coated on the uniform of firemen.
|