Polyurethanes (PUR)
Thermoplastic
Unreinforced molding
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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
75 to 137 C
Glass
Transition
(C)
Tg (Amorphous)
--- C
Processing
Temperature
Range Degrees F
Extrusion
370 to 500 F for Injection Molding
370 to510 F for Extrusion
Molding
Pressure Range ( PSI) (ksi)
6000 to 15000 psi
6 to 15 ksi
40 to 100 MPa
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Mold(Linear)
Shrinkage (in/in)
ASTM D955
0.004 to 0.010 in/in
Tensile
Strength at Break
ASTM D638
4500 to 9000 psi
30 to 60 MPa
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Elongation
at break (%)
ASTM D638
60 to 550 %
Tensile
Yield Strength (psi)
ASTM D638
7800 to 11000 psi
52 to 73 MPa
Compressive
Strength (psi)
Rupture or Yield
ASTM
D695
--- psi
--- MPa
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Compressive Strength
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Flexural
Strength (psi)
Rupture or Yield
ASTM D790
10200 to 15000 psi
68 to 100 MPa
Tensile
Modulus (psi)
ASTM D638
190000 to 300000 psi
1.3 to 2.0 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
4000 to 310000 psi
26.7 to 2.1 GPa
At 200 F
--- psi
--- GPa
At 250 F
--- psi
--- GPa
At 300 F
--- psi
--- GPa
Izod
Impact (ft-lb/in of notch)
ASTM D256A
1.5 to 1.8 to no break ft lb/in of notch
To go to Izod Values,
click on
Izod
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Hardness
Rockwell ASTM D785
M>100 M48
--
Shore D65 ASTM
D2240/D2583
A75 to D70
Coefficient
of Linear Thermal Expansion
(10 exp-6 )in/in/C
0.5
to 0.8 (10 x exp –6) in/in /C
0.000 000 5 to 0.000 000 8 in/in /C
Deflection
Temperature under flexural load (F)
ASTM D648
264 psi ---
158 to 260 F
66 psi ---
115 to 275 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
1.12 to 1.24
To go to Density /Specific Gravity Values,
click on
Density
Water
Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- 0.15 to 0.19 %
Saturation
0.5 to 0.6 %
Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
400 v/mil
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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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