Americas Styrenics Styron® 666D Polystyrene  (Unverified Data**)
Categories: Polymer; Thermoplastic; Polystyrene (PS)
Material Notes: STYRON® 666D general purpose polystyrene resin is used in injection molding applications, particularly for medical, pharmaceutical and food uses. It offers excellent clarity, intermediate flow characteristics, fast cycles, and good heat resistance. When used unmodified for the manufacture of food contact articles STYRON 666D 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 PropertiesMetricEnglishComments
Density 1.04 g/cc0.0376 lb/in³ASTM Data
Linear Mold Shrinkage 0.0050 cm/cm0.0050 in/in
Melt Flow 8.0 g/10 min
@Load 5.00 kg,
Temperature 200 °C		8.0 g/10 min
@Load 11.0 lb,
Temperature 392 °F		ASTM Data
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 44.8 MPa6500 psiASTM Data
Tensile Strength, Yield 44.8 MPa6500 psiASTM Data
Elongation at Break 1.6 %1.6 %ASTM Data
Elongation at Yield 1.7 %1.7 %ISO Data
Tensile Modulus 2.92 GPa424 ksiASTM Data
Charpy Impact Unnotched 0.900 J/cm²4.28 ft-lb/in²ISO Data, Low Temp
 1.00 J/cm²4.76 ft-lb/in²ISO Data
Charpy Impact, Notched 0.100 J/cm²0.476 ft-lb/in²ISO Data, Low Temp
 0.400 J/cm²1.90 ft-lb/in²ISO Data
 
Thermal PropertiesMetricEnglishComments
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
Specific Heat Capacity 2.10 J/g-°C0.502 BTU/lb-°F
Thermal Conductivity 0.123 W/m-K0.854 BTU-in/hr-ft²-°F
Deflection Temperature at 0.46 MPa (66 psi) 85.6 °C186 °FUnannealed; ASTM Data
Deflection Temperature at 1.8 MPa (264 psi) 77.2 °C171 °FUnannealed; ASTM Data
 85.0 °C185 °FAnnealed; ASTM Data
Vicat Softening Point 99.0 °C210 °F
Flammability, UL94 HB
@Thickness 3.20 mm		HB
@Thickness 0.126 in
 
Optical PropertiesMetricEnglishComments
Haze 1.0 %1.0 %
Transmission, Visible 90 %90 %

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