American Polymers API 390 Polystyrene

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American Polymers API 390 Polystyrene
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Molded, Unreinforced
Material Notes:	API 390 is a general purpose polystyrene produced in pellet form for injection molding. API 390 has excellent clarity and easy flow. Applications: Used in the manufacture of cosmetic containers, housewares, toys, and medical applications. Information provided by American Polymers, Inc.
Key Words:	PS
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Physical Properties	Metric	English	Comments

Density	1.05 g/cc	0.0379 lb/in³	ASTM D792
Melt Flow	8.0 g/10 min	8.0 g/10 min	Condition G; ASTM D1238

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell L	74	74	ASTM D785
Tensile Strength, Ultimate	43.4 MPa	6300 psi	ASTM D638
Elongation at Break	1.0 %	1.0 %	ASTM D638
Tensile Modulus	2.88 GPa	417 ksi	ASTM D638
Izod Impact, Notched	0.160 J/cm @Thickness 3.17 mm	0.300 ft-lb/in @Thickness 0.125 in	injection molded sample; ASTM D256

Thermal Properties	Metric	English	Comments
Deflection Temperature at 1.8 MPa (264 psi)	87.8 °C	190 °F	Annealed; ASTM D648
Vicat Softening Point	98.3 °C	209 °F	ASTM D1525

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