eFunda Polymers: Properties of Polyetherimide {unfilled}
engineering fundamentals Polymer Material Properties
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Polyetherimide
 
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Additives: unfilled
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   3312  compressive   D638
  2967  tensile   D638
Flexural Modulus (MPa)   3312   23 ºC   D790
  2553   93 ºC   D790
  2484  121 ºC   D790
  2415  149 ºC   D790
Tensile Strength (MPa)   97 at break   D638
 105 at yield   D638
Compressive Strength (MPa)
at yield or break
 151     D695
Flexural Strength (MPa)
at yield or break
 152     D790
Elongation at break (%)   60     D638
Hardness  109 - 110  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.5 - 0.6     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   47 - 56     D696
Deflection Temperature (ºC)  207 - 210   0.46 MPa   D648
 197 - 200   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.067     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.27   D792
Water Absorption (% weight increase)  1.25  saturated D570
 0.25  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  500   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  215 - 217  Tg, amorphous  
Processing Temperature (ºC)  338 - 427  injection molding  
Molding Pressure (MPa)   69 - 138    
Compression Ratio  1.5 - 3    
Linear Mold Shrinkage (cm/cm)  0.005 - 0.007   D955

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