Polymethylpentene (PMP)
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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
Melt
Flow ASTM D1238 (gm/10 min)
26 gm /10 min
Melting
Temperature degrees C
Tm Crystalline
230 to 240 C
Glass
Transition
(C)
Tg (Amorphous)
75 to 105 C
Processing
Temperature
Range Degrees F
Extrusion
510 to 610 for injection molding
510 to 650 F for extrusion
Molding
Pressure Range ( PSI) (ksi)
1000 to 10 000 psi
1 to 10 ksi
7 to 70 MPa
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Compression
Ratio
2.0 to 3.5
Mold(Linear)
Shrinkage (in/in)
ASTM D955
0.016 to 0.021
Tensile
Strength at Break
ASTM D638
2300 to 2500 psi
15 to 17 MPa
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Elongation
at break (%)
ASTM D638
20 to 120 %
Tensile
Yield Strength
(psi)
ASTM D638
2200 to 3400 psi
15 to 23 MPa
Compressive
Strength
(psi)
Rupture or Yield
ASTM D695
--- psi
--- MPa
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Flexural
Strength (psi)
Rupture or Yield
ASTM D790
6300 to 8300 psi
42 to 55 MPa
Tensile
Modulus (psi)
ASTM D638
160 000 to 180 000 psi
1.1 to 1.2 GPa
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Modulus
Compressive
Modulus (psi)
ASTM D695
114 000 to 171 000 psi
0.8 to 1.1 GPa
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Modulus
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Flexural
Modulus (psi)
ASTM D790
70 000 to 190 000 psi
0.5 to 1.3 GPa
At 200 F
36 000 psi
0.2 GPa
At 300 F
17 000 psi
0.1 GPa
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Modulus
Izod
Impact (ft-lb/in of notch)
ASTM D256A
2 to 3 ft lb/in of notch
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Hardness
Rockwell ASTM D785
R35 - 85
--
Shore D65 ASTM D2240/D2583
---
Coefficient
of Linear Thermal Expansion
(10 exp-6 )in/in/C
65 (10 x exp –6) in/in /C
0.000 065 in/in /C
Deflection
Temperature under flexural load (F)
ASTM D648
264 psi ---
120 to 130 F
66 psi ---
180 to 190 F
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Thermal
Conductivity
(10 x exp –4)al cm/sec cm2 C
ASTM C177
4.0 (10 x exp –4) cal cm/sec cm2
0.0004 cal cm/sec cm2
Specific
Gravity
ASTM D792
0.833 to 0.835
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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)
1096 to 1098 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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