eFunda Polymers: Properties of Polystyrene and styrene copolymers {homopolymer, heat resistant}
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Polystyrene and styrene copolymers		  
List of Suppliers
State: homopolymer
Application: heat resistant
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   3416 - 3450  compressive   D638
  3105 - 3347  tensile   D638
Flexural Modulus (MPa)   3105 - 3450   23 ºC   D790
Tensile Strength (MPa)   45 - 57 at break   D638
  45 - 57 at yield   D638
Compressive Strength (MPa)
at yield or break		   90 - 97     D695
Flexural Strength (MPa)
at yield or break		   90 - 97     D790
Elongation at break (%)   2 - 4     D638
Hardness   75 - 84  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)   68 - 85     D696
Deflection Temperature (ºC)   94 - 107   0.46 MPa   D648
  90 - 103   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  saturated D570
 0.01  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   500 - 525   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  100 - 110  Tg, amorphous  
Processing Temperature (ºC)  149 - 205  compression molding  
 177 - 260  injection molding  
 177 - 260  extrusion  
Molding Pressure (MPa)   35 - 138    
Compression Ratio  3 - 5    
Linear Mold Shrinkage (cm/cm)  0.004 - 0.007   D955

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Suppliers
A. Schulman Akron, OH  800-662-7203
American Polymers, Inc. Worcester, MA   
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
Fina Oil & Chemical Co. Dallas, TX  800-344-3462
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

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