eFunda Polymers: Properties of Thermoplastic elastomers {elastomeric alloy, low and medium hardness}
engineering fundamentals Polymer Material Properties
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Thermoplastic elastomers
 
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State: elastomeric alloy
Application: low and medium hardness
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   5 - 35  tensile   D638
Flexural Modulus (MPa)   10 - 46   23 ºC   D790
Tensile Strength (MPa)   4 - 22 at break   D638
Elongation at break (%)   300 - 750     D638
Hardness   55 - 95  Shore A   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
 no fracture     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   82     D696

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  0.9 - 1.39   D792
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  400 - 600   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  165  Tm, crystalline  
Processing Temperature (ºC)  177 - 232  injection molding  
Molding Pressure (MPa)   41 - 69    
Compression Ratio  2.5 - 3.5    
Linear Mold Shrinkage (cm/cm)  0.0015 - 0.0025   D955

Suppliers
A. Schulman Akron, OH  800-662-7203
AlphaGary Corp. Leominster, MA  800-232-9741
Goodyear Tire & Rubber Co. Akron, OH  800-548-8107
M.A. Hanna Engineered Materials Norcross, GA   
Montell North America Wilmington, DE   
Network Polymers, Inc. Akron, OH  888-437-4674
Novatec Plastics & Chemicals Co., Inc. Eatontown, NJ  800-782-6682
Solutia, Inc. St Louis, MO   
Vi-Chem Corp. Grand Rapids, MI  800-477-8501
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