Properties 

Polyetherimde 
/PEI 

Topics   Index

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Copyright 2002 by Roger D. Corneliussen
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Values are from Modern Plastics Encyclopedia 99.

To jump to a particular property, click on the name listed below.

Melt Flow
Melting Temperature
Glass Transition
Processing Molding Pressure
Processing Molding Temperature
Compression Ratio
Mold Shrinkage
Tensile Strength
Elongation
Tensile Yield Strength
Compressive Strength
Flexural Strength
Tensile Modulus
Flexural Modulus
Izod Impact Strength
Hardness
Deflection Temperature
Thermal Expansion
Thermal Conductivity
Specific Gravity
Dielectric Strength
Water Absorption

Note: The ASTM numbers are linked to 
their descriptions on the ASTM website.  
To go to the description, simply
click on the ASTM number

Melt Flow 
ASTM D1238
(gm/10 min)

--- gm /10 min

Melting Temperature  degrees C
Tm Crystalline
334 C

Glass Transition (C)
Tg (Amorphous)

215 to 217 C

Processing Temperature Range Degrees F
Extrusion

640 to 800 F for injection molding

Molding Pressure Range ( PSI) (ksi)
10000 to  20000 psi
10 to 20 ksi
6 7 to 134 MPa

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Compression Ratio
1.5 to 3

Mold(Linear) Shrinkage (in/in)
ASTM D955
0.005 to 0.007 in/in

Tensile Strength at Break
ASTM D638
14000 psi
93 MPa

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Elongation at break (%)
ASTM D638
60 %

Tensile Yield Strength (psi)
ASTM D638
15200 psi
101 MPa

Compressive Strength (psi)
Rupture or Yield
ASTM D695
21900  psi
146 MPa

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Flexural Strength (psi)
Rupture or Yield
ASTM D790
22000  psi
147 MPa

 Tensile Modulus (psi)
ASTM D638
430000 psi
2.9 GPa

To go to Modulus Values,
click on
Modulus

Compressive Modulus (psi)
ASTM D695
480000 psi
3.2 GPa

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Flexural Modulus (psi)
ASTM D790
At 73 F
480000 psi
3.3 GPa
At 200 F
370000 psi
2.5 GPa
At 250 F
360000 psi
2.4 GPa
At 300 F
350000 psi
2.3 GPa

Izod Impact (ft-lb/in of notch)
ASTM D256

1.0 to 1.2 ft lb/in of notch

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Hardness
Rockwell ASTM D785
M109-110
--
Shore D65 ASTM D2240/D2583
---

Coefficient of Linear Thermal Expansion
(10 exp-6 )in/in/C
47 to 56 (10 x exp 6) in/in /C
0.000 047 to 0.000 056  in/in /C

Deflection Temperature under flexural load (F)
ASTM D648
264 psi ---
387 to 392 F
66 psi  ---
405 to 410 F

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Thermal Conductivity
(10 x exp 4)al cm/sec cm2 C
ASTM C177
1.6 (10 x exp 4) cal cm/sec cm2
0.00016   cal cm/sec cm2

Specific Gravity
ASTM D792
1.27

To go to Density /Specific Gravity Values,
click on
Density

Water Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- 0.25 %
Saturation 
1.25  %

Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
500 v/mil

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Topics   Index

**************************************
Copyright 2002 by Roger D. Corneliussen
No part of this transmission is to be
duplicated, in any manor, or forwarded by
electronic mail without the express written
permission of Roger D. Corneliussen
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