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Glossary » Materials » Polymers » Polystyrene » Styrene / Maleic Anhydride (SMA) Copolymer » Molding and Extrusion
Molding and Extrusion PS is a subcategory of Polystyrene. It is specially formulated to molding and extrusion. Its elastic modulus ranges from 340 to 390 MPa. Its flexural modulus ranges from 320 to 470 MPa. Its flexural strength ranges from 8000 to 14200 MPa. Its Izod Impact strength ranges from 0.4 to 2 J/cm. Its elongation at break ranges from 1.8 to 30 %. Its hardness ranges from 106 to 109 Rockwell R. Its specific gravity ranges from 1.05 to 1.08. Its molding pressure ranges from 12 to 17 MPa.
Polystyrene, also known as PS, is a thermoplastic polymer. The most common trade name is Novacor 555. styrene / maleic anhydride (SMA) 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.
Additional Information
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, 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, PS, and 20% PAN Carbon Fiber EMI Shielding (conductive) PS.
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Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

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