Americas Styrenics Styron® 678C Polystyrene

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Americas Styrenics Styron® 678C Polystyrene (discontinued **)
Categories:	Polymer; Thermoplastic; Polystyrene (PS)
Material Notes:	STYRON® 678C general purpose polystyrene resin is a high flow, medium strength resin with good scuff resistance. It is typically used in thin-wall or consumer electronic applications. When used unmodified for the manufacture of food contact articles STYRON 678C 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	Original Value	Comments

Density	1.04 g/cc	ASTM Data
Linear Mold Shrinkage	0.0050 cm/cm
Melt Flow	10 g/10 min @Load 5.00 kg, Temperature 200 °C	ASTM Data

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	47.6 MPa	ASTM Data
Tensile Strength, Yield	47.6 MPa	ASTM Data
Elongation at Break	1.2 %	ASTM Data
Tensile Modulus	3.13 GPa	ASTM Data
Charpy Impact Unnotched	1.00 J/cm²	ISO Data
	1.00 J/cm²	ISO Data, Low Temp
Charpy Impact, Notched	0.100 J/cm²	ISO Data, Low Temp
	0.200 J/cm²	ISO Data

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	90.0 µm/m-°C @Temperature 20.0 °C	ASTM data
Deflection Temperature at 0.46 MPa (66 psi)	81.1 °C	Unannealed; ASTM Data
Deflection Temperature at 1.8 MPa (264 psi)	72.8 °C	Unannealed; ASTM Data
Vicat Softening Point	93.3 °C
Flammability, UL94	HB @Thickness 3.20 mm

Optical Properties	Original Value	Comments
Haze	1.0 %
Transmission, Visible	90 %

Compliance Properties	Original Value	Comments
FDA	Yes	See notes for details.

**
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PDW171 / 34402

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