Polybutylene
Extrusion compound
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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
Note:
The ASTM numbers are linked to
their descriptions on the ASTM website.
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Melt
Flow
ASTM D1238
(gm/10 min)
--- gm /10 min
Melting
Temperature degrees C
Tm Crystalline
126 C
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Contents
Glass
Transition
(C)
Tg (Amorphous)
--- C
Processing
Temperature
Range Degrees F
Extrusion
300 to 350 F for compression molding
290 to 380 F for injection molding
290 to 380 F for extrusion
Molding
Pressure Range ( PSI) (ksi)
10000 to 30000 psi
10 to 30 ksi
67to 200 MPa
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Contents
Mold(Linear)
Shrinkage (in/in)
ASTM D955
0.003 in/in (unaged)
0.026 in/in (aged)
Tensile
Strength at Break
ASTM D638
3800 to 4400 psi
25 to 29 MPa
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Contents
Elongation
at break (%)
ASTM D638
300 to 380 %
Tensile
Yield Strength (psi)
ASTM D638
1700 to 2500 psi
11 to 17 MPa
Compressive
Strength (psi)
Rupture or Yield
ASTM
D695
--- psi
--- MPa
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Contents
Flexural
Strength (psi)
Rupture or Yield
ASTM D790
2000 to 2300 psi
13 to 15 MPa
Tensile
Modulus (psi)
ASTM D638
30000 to 40000 psi
0.2 to 0.3 GPa
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Modulus
Compressive
Modulus (psi)
ASTM
D695
31000 psi
0.2 GPa
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Contents
Flexural
Modulus (psi)
ASTM D790
At 73 F
45000 to 50000 psi
0.3 to 0.33 GPa
At 200 F
--- psi
--- GPa
At 250 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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Contents
Hardness
Rockwell ASTM D785
---
--
Shore D65 ASTM
D2240/D2583
D55-65
Coefficient
of Linear Thermal Expansion
128 to 150
(10 x exp –6) in/in /C
0.000 128 to 0.000 150 in/in /C
Deflection
Temperature under flexural load (F)
ASTM D648
264 psi ---
130 to 140 F
66 psi ---
215 to 235 F
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Contents
Thermal
Conductivity
ASTM C177
5.2 (10 x exp –4) cal cm/sec cm2
0.00052 cal cm/sec cm2
Specific
Gravity
ASTM D792
0.91 to 0.925
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Density
Water
Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- 0.01 to 0.02%
Saturation
0.33 %
Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
>450 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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