eFunda Polymers: Properties of Polyimide {thermoplastic, unfilled}
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Polyimide		  
List of Suppliers
State: thermoplastic
Additives: unfilled
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   2070 - 2760  tensile   D638
  2174 - 2415  compressive   D638
Flexural Modulus (MPa)   2484 - 3450   23 ºC   D790
  1449  149 ºC   D790
Tensile Strength (MPa)   73 - 118 at break   D638
  87 - 90 at yield   D638
Compressive Strength (MPa)
at yield or break		  121 - 276     D695
Flexural Strength (MPa)
at yield or break		   69 - 199     D790
Elongation at break (%)   8 - 90     D638
Hardness   52 - 99  Rockwell E   D638
 129  Rockwell R   D638
  95  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.8 - 0.9     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   45 - 56     D696
Deflection Temperature (ºC)  238 - 360   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.096 - 0.176     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.33 - 1.43   D792
Water Absorption (% weight increase)  1.2  saturated D570
 0.24 - 0.34  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   415 - 560   D149

 Processing Properties Conditions
Type ASTM
Melt Flow (gm/10 min)  4.5 - 7.5   D1238
Melting Temperature (ºC)  250 - 365  Tg, amorphous  
Melting Temperature (ºC)  388  Tm, crystalline  
Processing Temperature (ºC)  330 - 366  compression molding  
 390 - 394  injection molding  
 390 - 394  extrusion  
Molding Pressure (MPa)   21 - 138    
Compression Ratio  1.7 - 4    
Linear Mold Shrinkage (cm/cm)  0.0083   D955

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Suppliers
Ciba Specialty Chemicals Corp. Tarrytown, NY  800-431-2360
DuPont Co., Polymers Wilmington, DE  800-438-7225
Mitsui Chemicals America, Inc. Purchase, NY  800-682-2377
Solutia, Inc. St Louis, MO   

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