eFunda Polymers: Properties of Polystyrene and styrene copolymers {copolymer, impact modified, high heat resistant}
engineering fundamentals Polymer Material Properties
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Polystyrene and styrene copolymers
 
List of Suppliers
State: copolymer
Additives: impact modified
Application: high heat resistant
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   1932 - 2277  tensile   D638
Flexural Modulus (MPa)   2208 - 2553   23 ºC   D790
Tensile Strength (MPa)   32 - 40 at break   D638
Flexural Strength (MPa)
at yield or break
  59 - 72     D790
Elongation at break (%)   10 - 20     D638
Hardness   75 - 95  Rockwell R   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.8 - 2.1     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   67 - 79     D696
Deflection Temperature (ºC)  110 - 127   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.05 - 1.08   D792
Water Absorption (% weight increase)  0.1  after 24 hrs D570

 Processing Properties Conditions
Type ASTM
Melt Flow (gm/10 min)  1 - 1.8   D1238
Processing Temperature (ºC)  218 - 282  injection molding  
 204 - 260  extrusion  
Linear Mold Shrinkage (cm/cm)  0.003 - 0.006   D955

Suppliers
Bayer Corp. Pittsburgh, PA  800-662-2927
NOVA Chemicals, Ltd. Calgary, Alberta T2P 5C6, Canada   
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