eFunda: Glossary: Materials: Polymers: Polystyrene: Styrene / Methyl-Methacrylate Copolymer

PS is a subcategory of Polystyrene. Its elastic modulus ranges from 440 to 480 MPa. Its flexural modulus ranges from 450 to 460 MPa. Its tensile strength ranges from 8100 to 10100 MPa at break. Its flexural strength ranges from 14100 to 16000 MPa. Its Izod Impact strength ranges from 0.3 to 0.4 J/cm. Its elongation at break ranges from 2.1 to 5 %. Its hardness ranges from 80 to 85 Rockwell M. Its specific gravity ranges from 1.08 to 1.13. Its coefficient of thermal expansion ranges from 40 to 72 x 10^-6/°C. Its melting temperature ranges from 100 to 105 °C. Its molding pressure ranges from 5 to 20 MPa.

Polystyrene, also known as PS, is a thermoplastic polymer. The most common trade name is Novacor 555. styrene / methyl-methacrylate copolymer It is an inexpensive material that is not structurally strong but easy to mold. It machines well, and is highly transparent. PS is commonly used for inexpensive packaging materials, pens, safety razors, flatware, and CD jewel boxes. In Styrofoam forms, PS is used to make high-throughput, thin-walled, easy-to-mold parts where structure is not paramount.

Other common Polystyrene (PS) include High and Medium Flow PS, Heat Resistant PS, 20% Long and Short Glass Fiber Reinforced PS, Rubber-Modified Flame-Retardant, UL-V0 PS, Rubber-Modified High Impact PS, Molding and Extrusion PS, Olefin Rubber Modified PS, 20% Glass Fiber Reinforced PS, Clear PS, Extrusion, Blow Molding, Injection Molding Grades PS, Clear Styrene Butadiene Copolymers PS, Molding and Extrusion PS, Impact Modified PS, 20% Glass Fiber Reinforced PS, High Heat Resistant, Injection Molding PS, Impact Modified High Heat Resistant PS, 20% Glass Fiber Reinforced High Heat Resistant PS, and 20% PAN Carbon Fiber EMI Shielding (conductive) PS.

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In Styrofoam format, PS is used to make high-throughput, thin-walled, easy-to-mold parts where structure is not paramount. ...

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