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Polystyrene and styrene copolymers
List of Suppliers
Additives: rubber-modified
Application: high impact
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   1104 - 2553  tensile   D638
Flexural Modulus (MPa)   1104 - 2691   23 ºC   D790
Tensile Strength (MPa)   13 - 43 at break   D638
  14 - 41 at yield   D638
Flexural Strength (MPa)
at yield or break
  23 - 69     D790
Elongation at break (%)   20 - 65     D638
Hardness   50 - 82  Rockwell R   D638
  60  Rockwell L   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.5 - 3.7     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   44     D696
Deflection Temperature (ºC)   74 - 93   0.46 MPa   D648
  77 - 96   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.03 - 1.06   D792
Water Absorption (% weight increase)  0.05 - 0.07  after 24 hrs D570

 Processing Properties Conditions
Melt Flow (gm/10 min)  5.8   D1238
Melting Temperature (ºC)   9 - 105  Tg, amorphous  
Processing Temperature (ºC)  177 - 274  injection molding  
 191 - 260  extrusion  
Molding Pressure (MPa)   69 - 138    
Compression Ratio  4    
Linear Mold Shrinkage (cm/cm)  0.004 - 0.007   D955
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
Bayer Corp. Pittsburgh, PA  800-662-2927
Chevron Chemical Co. Houston, TX  800-231-3828
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   
NOVA Chemicals, Ltd. Calgary, Alberta T2P 5C6, Canada   
R.S.G. Polymers Corp. Stony Brook, NY   
RTP Co. Winona, MN  800-433-4787
Shuman Plastics, Inc. Depew, NY