eFunda Polymers: Properties of Thermoplastic elastomers {polyester}
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Thermoplastic elastomers
 
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State: polyester
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   52 - 332  compressive   D638
  8 - 897  tensile   D638
Flexural Modulus (MPa)   35 - 1208   23 ºC   D790
Tensile Strength (MPa)   7 - 47 at break   D638
  10 - 27 at yield   D638
Elongation at break (%)   170 - 900     D638
Hardness  104  Rockwell   D638
  35 - 72  Shore D   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  1.3 - 0     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   85 - 190     D696
Deflection Temperature (ºC)   44 - 140   0.46 MPa   D648
Thermal Conductivity (W/m-ºC)  0.150 - 0.188     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.1 - 1.28   D792
Water Absorption (% weight increase)  0.2 - 3.6  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  350 - 600   D149

 Processing Properties Conditions
Type ASTM
Melt Flow (gm/10 min)  3 - 12  at 190-240 ºC D1238
Melting Temperature (ºC)  148 - 230  Tm, crystalline  
Processing Temperature (ºC)  172 - 260  injection molding  
 172 - 260  extrusion  
Molding Pressure (MPa)   7 - 104    
Compression Ratio  3 - 3.5    
Linear Mold Shrinkage (cm/cm)  0.003 - 0.018   D955

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Suppliers
DuPont Co., Polymers Wilmington, DE  800-438-7225
Ticona Summit, NJ  800-526-4960

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