Properties

Polymethylpentene  (PMP)

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

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

To go to Modulus Values,
click on
Modulus

Compressive Modulus (psi)
ASTM D695
114 000 to 171 000 psi
0.8 to 1.1 GPa

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click on
Modulus

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Flexural Modulus (psi)
ASTM D790
At 73 F
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

To go to Modulus Values,
click on
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

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)
1096 to 1098 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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