Americas Styrenics Styron® 685P Polystyrene

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Americas Styrenics Styron® 685P Polystyrene
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Heat Resistant Grade
Material Notes:	STYRON® 685P general purpose polystyrene resin is a high heat resin with good strength, moldability/processability, and excellent clarity. This resin is typically used in consumer electronic applications. When used unmodified for the manufacture of food contact articles STYRON 685P complies with the US Food, Drug and Cosmetic Act and Food Additive Regulations 21 CFR 177.1640. The regulations should be consulted for complete details. Data provided by Dow Chemical. Americas Styrenics was formed in 2008 as a joint venture between Dow Chemical and Chevron Phillips Chemical Company. Styron was a Dow trade name before the JV formation.
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Physical Properties	Metric	English	Comments

Density	1.04 g/cc	0.0376 lb/in³	ASTM Data
Linear Mold Shrinkage	0.0050 cm/cm	0.0050 in/in
Melt Flow	2.2 g/10 min @Load 5.00 kg, Temperature 200 °C	2.2 g/10 min @Load 11.0 lb, Temperature 392 °F	ASTM Data

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	52.4 MPa	7600 psi	ASTM Data
Tensile Strength, Yield	52.4 MPa	7600 psi	ASTM Data
Elongation at Break	2.2 %	2.2 %	ASTM Data
Elongation at Yield	2.0 %	2.0 %	ISO Data
Tensile Modulus	3.20 GPa	464 ksi	ASTM Data
Charpy Impact Unnotched	0.800 J/cm²	3.81 ft-lb/in²	ISO Data
	1.00 J/cm²	4.76 ft-lb/in²	ISO Data, Low Temp
Charpy Impact, Notched	0.100 J/cm²	0.476 ft-lb/in²	ISO Data, Low Temp
	0.300 J/cm²	1.43 ft-lb/in²	ISO Data

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	90.0 µm/m-°C @Temperature 20.0 °C	50.0 µin/in-°F @Temperature 68.0 °F	ASTM data
Deflection Temperature at 0.46 MPa (66 psi)	96.7 °C	206 °F	Unannealed; ASTM Data
Deflection Temperature at 1.8 MPa (264 psi)	83.3 °C	182 °F	Unannealed; ASTM Data
Vicat Softening Point	108 °C	226 °F
Flammability, UL94	HB @Thickness 3.20 mm	HB @Thickness 0.126 in

Optical Properties	Metric	English	Comments
Haze	1.0 %	1.0 %
Transmission, Visible	90 %	90 %

Compliance Properties	Metric	English	Comments
FDA	Yes	Yes	See notes for details.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PDW174 / 34405

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