eFunda Polymers: Properties of Polystyrene and styrene copolymers {acrylonitrile / styrene / acrylic (ASA) copolymer, extrusion, blow molding, injection molding grades}
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Polystyrene and styrene copolymers		  
List of Suppliers
State: acrylonitrile / styrene / acrylic (ASA) copolymer
Application: extrusion, blow molding, injection molding grades
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Flexural Modulus (MPa)   1518 - 2353   23 ºC   D790
Tensile Strength (MPa)   28 - 52 at break   D638
  36 - 39 at yield   D638
Flexural Strength (MPa)
at yield or break		   42 - 56     D790
Elongation at break (%)   25 - 40     D638
Hardness   85 - 90  Rockwell R   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   4.8 - 5.8     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   59     D696
Deflection Temperature (ºC)   94 - 99   0.46 MPa   D648
  85 - 88   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.05 - 1.06   D792
Water Absorption (% weight increase)  0.2 - 0.3  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   490   D149

 Processing Properties Conditions
Type ASTM
Processing Temperature (ºC)  205 - 244  injection molding  
 194 - 233  extrusion  
Molding Pressure (MPa)   63 - 104    
Compression Ratio  2.8 - 3    
Linear Mold Shrinkage (cm/cm)  0.004 - 0.006   D955

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Suppliers
BASF Corp. Mount Olive, NJ  800-BC-RESIN
Bayer Corp. Pittsburgh, PA  800-662-2927
Diamond Polymers Akron, OH  888-437-4674
GE Plastics Pittsfield, MA  800-845-0600
LG Chemical America, Inc. Englewood Cliffs, NJ   
Network Polymers, Inc. Akron, OH  888-437-4674

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