Ultrahigh Molecular Weight Polyethylene (UHMWPE)
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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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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
**************************************
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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