eFunda Polymers: Properties of Polystyrene and styrene copolymers {homopolymer, high and medium flow}
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Polystyrene and styrene copolymers
 
List of Suppliers
State: homopolymer
Application: high and medium flow
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   3312 - 3381  compressive   D638
  2277 - 3278  tensile   D638
Flexural Modulus (MPa)   2622 - 3381   23 ºC   D790
Tensile Strength (MPa)   36 - 52 at break   D638
Compressive Strength (MPa)
at yield or break
  83 - 90     D695
Flexural Strength (MPa)
at yield or break
  69 - 101     D790
Elongation at break (%)   1 - 3     D638
Hardness   60 - 75  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.2 - 0.2     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   50 - 83     D696
Deflection Temperature (ºC)   68 - 96   0.46 MPa   D648
  76 - 94   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.125     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.04 - 1.05   D792
Water Absorption (% weight increase)  0.01 - 0.03  saturated D570
 0.01 - 0.03  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  500 - 575   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)   74 - 105  Tg, amorphous  
Processing Temperature (ºC)  149 - 204  compression molding  
 177 - 260  injection molding  
 177 - 260  extrusion  
Molding Pressure (MPa)   34 - 138    
Compression Ratio  3    
Linear Mold Shrinkage (cm/cm)  0.004 - 0.007   D955

Suppliers
A. Schulman Akron, OH  800-662-7203
American Polymers, Inc. Worcester, MA   
Bamberger Polymers, Inc. Jericho, NY   
BASF Corp. Mount Olive, NJ  800-BC-RESIN
Chevron Chemical Co. Houston, TX  800-231-3828
Deltech Polymers Corp. Troy, OH  800-245-3150
Dow Plastics Midland, MI  800-441-4369
Federal Plastics Corp. Cranford, NJ  800-541-4424
Fina Oil & Chemical Co. Dallas, TX  800-344-3462
Huntsman Corp. Salt Lake City, UT  800-421-2411
LG Chemical America, Inc. Englewood Cliffs, NJ   
Mobil Chemical Co. Edison, NJ   
Network Polymers, Inc. Akron, OH  888-437-4674
R.S.G. Polymers Corp. Stony Brook, NY   
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