Polystyrene is an aromatic polymer made from the aromatic monomer styrene. It is one of the most widely used kinds of plastic and can be recycled. It comes in two forms; solid form of polystyrene and foam form of polystyrene.
Solid Polystyrene is commonly used in the manufacturing of objects where a fairly economical plastic is desired, such as the following: disposable cutlery, plastic models, CD and DVD cases, smoke detectors housings, and license plates. Most common solid polystyrene are GPPS (General Purpose Polystyrene) and HIPS (High Impact Polystyrene). These are used to produced above mentioned products.
Foam Polystyrene is the most commonly used form of Polystyrene. Polystyrene foams are good thermal insulations and are therefore essential in building insulation materials. Also, these foams exhibit good damping properties and are there used widely in packaging. Products that are manufactured with polystyrene foam include the following: structural insulated panel buildings systems, packing materials, and insulation and foam drink cups. Most common foam Polystyrene is EPS (Expanded Polystyrene) and is mostly used for building insulation and packing material for cushioning fragile items inside boxes.
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