eFunda Polymers: Properties of Polyester (thermoplastic) {alloy, unfilled}
engineering fundamentals Polymer Material Properties
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Polyester (thermoplastic)
 
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State: alloy
Additives: unfilled
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Flexural Modulus (MPa)   1449 - 1932   23 ºC   D790
Tensile Strength (MPa)   34 - 44 at break   D638
Flexural Strength (MPa)
at yield or break
  49 - 61     D790
Elongation at break (%)   150 - 300     D638
Hardness  101 - 115  Rockwell R   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
 no break     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   20     D696
Deflection Temperature (ºC)   83 - 127   0.46 MPa   D648
  41 - 52   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.288     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.23 - 1.25   D792
Water Absorption (% weight increase)  0.1  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  460   D149

 Processing Properties Conditions
Type ASTM
Processing Temperature (ºC)  247 - 283  injection molding  
Molding Pressure (MPa)   35 - 118    
Compression Ratio  3 - 4    
Linear Mold Shrinkage (cm/cm)  0.016 - 0.018   D955

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Suppliers
Eastman Chemical Co. Kingsport, TN  800-327-8626
GE Plastics Pittsfield, MA  800-845-0600
Ticona Summit, NJ  800-526-4960

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