eFunda Polymers: Properties of Polystyrene and styrene copolymers {rubber-modified, flame-retardant, UL-V0}
engineering fundamentals Polymer Material Properties
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Polystyrene and styrene copolymers
 
List of Suppliers
Additives: rubber-modified
Application: flame-retardant, UL-V0
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   1656 - 2070  tensile   D638
Flexural Modulus (MPa)   1932 - 2277   23 ºC   D790
Tensile Strength (MPa)   18 - 28 at break   D638
  21 - 30 at yield   D638
Flexural Strength (MPa)
at yield or break
  31 - 52     D790
Elongation at break (%)   30 - 50     D638
Hardness   38 - 65  Rockwell R   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  1.0 - 1.7     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   45     D696
Deflection Temperature (ºC)   80 - 83   0.46 MPa   D648
  82 - 96   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.15 - 1.17   D792
Water Absorption (% weight increase)  0  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  550   D149

 Processing Properties Conditions
Type ASTM
Processing Temperature (ºC)  204 - 232  injection molding  
 191 - 218  extrusion  
Molding Pressure (MPa)   41 - 103    
Compression Ratio  3    
Linear Mold Shrinkage (cm/cm)  0.003 - 0.006   D955

Suppliers
A. Schulman Akron, OH  800-662-7203
BASF Corp. Mount Olive, NJ  800-BC-RESIN
Dow Plastics Midland, MI  800-441-4369
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
RTP Co. Winona, MN  800-433-4787
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