Chevron Phillips MC9520 Rubber Modified Polystyrene

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Chevron Phillips MC9520 Rubber Modified Polystyrene (discontinued **)
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Impact Modified
Material Notes:	Description Chevron MC9520 is a medium impact, injection grade polystyrene resin with a unique balance of flow and heat distortion temperature properties. The combination of properties allows it to be molded on fast cycles into products that offer impressive performance properties, particularly in practical toughness tests. Chevron rubber modified polystyrene MC9520 natural complies with Food Additive Regulation 21CFR177.1640 for polystyrene and rubber modified polystyrene, which states that such materials may be safely used in contact with foods. Applications The properties of Chevron MC9520 suggest its use in applications requiring good flow and set-up characteristics (such as thin-walled containers and air conditioner grills), good dimensional stability and resistance to cold flow (such as closures) and good practical toughness (such as toilet seat covers and housewares.Information provided by Chevron Phillips Chemical Company. The Chevron Phillips polystyrene product line was transferred to Americas Styrenics in 2008.
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Physical Properties	Original Value	Comments

Density	1.03 g/cc	ASTM D792
Melt Flow	8.0 g/10 min	Condition G; ASTM D1238

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	3500 psi	at 2.0 in/min; ASTM D638
Tensile Strength, Yield	4000 psi	at 2.0 in/min; ASTM D638
Elongation at Break	50 %	ASTM D638
Tensile Modulus	350000 psi	ASTM D638
Flexural Strength	5400 psi	ASTM D790B
Flexural Modulus	350000 psi	ASTM D790B
Izod Impact, Notched	1.20 ft-lb/in	1/4 in.; ASTM D256
	1.50 ft-lb/in	1/8 in.; ASTM D256

Thermal Properties	Original Value	Comments
Deflection Temperature at 1.8 MPa (264 psi)	177 °F	ASTM D648
Vicat Softening Point	207 °F	ASTM D1525

Compliance Properties	Original Value	Comments
FDA	Yes

**
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PPSRA26 / 58256

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