Properties 

Ultrahigh Molecular Weight Polyethylene (UHMWPE)

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 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
125 to 128 C

Glass Transition (C)
Tg (Amorphous)

--- C

Processing Temperature Range Degrees F
Extrusion

400 to 500 F for compression molding

Molding Pressure Range ( PSI) (ksi)
1000 to  2000 psi
1 to 2 ksi
7 to 13 MPa

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Compression Ratio
---

Mold(Linear) Shrinkage (in/in)
ASTM D955
0.040 in/in

Tensile Strength at Break
ASTM D638
5600 to 7000 psi
37 to 47 MPa

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Elongation at break (%)
ASTM D638
350 to 525 %

Tensile Yield Strength (psi)
ASTM D638
3100 to 4000 psi
21 to 27 MPa

Compressive Strength (psi)
Rupture or Yield
ASTM D695
---  psi
--- MPa

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Flexural Strength (psi)
Rupture or Yield
ASTM D790
---  psi
--- MPa

 Tensile Modulus (psi)
ASTM D638
--- psi
--- GPa

To go to Modulus Values,
click on
Modulus

Compressive Modulus (psi)
ASTM D695
--- psi
--- GPa

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Flexural Modulus (psi)
ASTM D790
At 73 F
130 000 to 140 000 psi
0.87 to 0.93 GPa
At 200 F
--- psi
--- GPa
At 300 F
--- psi
--- GPa

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

No break ft lb/in of notch

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Hardness
Rockwell ASTM D785
R50
--
Shore D65 ASTM D2240/D2583
Shore D61-63

Coefficient of Linear Thermal Expansion
(10 exp-6 )in/in/C
130 to 200 (10 x exp 6) in/in /C
0.000 130 to 0.000 200  in/in /C

Deflection Temperature under flexural load (F)
ASTM D648
264 psi ---
110 to 120 F
66 psi  ---
155 to 180 F

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

Specific Gravity
ASTM D792
0.940

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

Water Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- <0.01 %
Saturation 
---  %

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

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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