Last reviewed:June 2019
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- Copolymers, blends, and modifications
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A thermoplastic polymer made from the monomer styrene; also known as poly(1-phenylethylene). Polystyrene is a hard, transparent, glasslike (brittle) material, with good thermal and electrical insulating properties, a high refractive index, and, most often, a low softening temperature. Polystyrene can be processed into rigid parts or foamed (see illustration). See also: Brittleness; Electric insulator; Foam; Heat insulation; Optical materials; Plastics processing; Polymer; Styrene
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