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Americas Styrenics STYRON® 421 High Impact Polystyrene

Category Polymer , Thermoplastic , Polystyrene (PS) , Polystyrene, Impact Modified
Manufacturer Americas Styrenics LLC
Trade Name STYRON®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Americas Styrenics STYRON® 421 High Impact Polystyrene.pdf
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Material Notes:
Product CharacteristicsStiffness/FlowHeat resistanceContact clarityFood Contact CompliantUL Classification 94HBTypical ApplicationsAppliancesRefrigerationPackaging/disposablesConsumer electronicsInformation provided by AmericasStyrenics LLC.
Physical Properties Metric English Comments
Specific Gravity 1.04 g/cc
1.04 g/cc
ASTM D792
Linear Mold Shrinkage 0.0040 - 0.0080 cm/cm
0.0040 - 0.0080 in/in
ASTM D955
Melt Flow 3.9 g/10 min

@Load 5.00 kg,
Temperature 200 °C
3.9 g/10 min

@Load 11.0 lb,
Temperature 392 °F
ASTM D1238
Mechanical Properties Metric English Comments
Hardness, Rockwell R 115
115
ASTM D785
Tensile Strength at Break 31.0 MPa
4500 psi
ASTM D638
Tensile Strength 33.8 MPa
4900 psi
ASTM D638
Elongation at Break 60 %
60 %
ASTM D638
Tensile Modulus 2.24 GPa
325 ksi
ASTM D638
Flexural Strength 43.4 MPa
6300 psi
ASTM D790
Flexural Modulus 2.28 GPa
330 ksi
ASTM D790
Izod Impact, Notched 0.769 J/cm
1.44 ft-lb/in
compression molded; ASTM D256
1.01 J/cm
1.90 ft-lb/in
injection molded; ASTM D256
Thermal Properties Metric English Comments
CTE, linear 90.0 µm/m-°C
50.0 µin/in-°F
ASTM D696
Deflection Temperature at 0.46 MPa (66 psi) 92.2 °C
198 °F
ASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 82.2 °C
180 °F
ASTM D648
Vicat Softening Point 103 °C
218 °F
ASTM D1525
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