High Impact Polystyrene
(HIPS)
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Copyright 2002 by Roger D. Corneliussen
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To jump to a particular property, click on the name listed below.
From Modern Plastics Encyclopedia 99, p. B-198
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)
5.8 gm /10 min
Melting
Temperature degrees C
Tm Crystalline
--- C
Glass
Transition
(C)
Tg (Amorphous)
93 to 105 C
Processing
Temperature
Range Degrees F
Extrusion
350 to 525 F for Injection Molding
375 to 500 F for Extrusion
Molding
Pressure Range ( PSI) (ksi)
10000 to 20000 psi
10 to 20 ksi
67 to 133 MPa
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Mold(Linear)
Shrinkage (in/in)
ASTM D955
0.004 to 0.007 in/in
Tensile
Strength at Break
ASTM D638
1900 to 6200 psi
13 to 41 MPa
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Elongation
at break (%)
ASTM D638
20 to 65 %
Tensile
Yield Strength (psi)
ASTM D638
2100 to 6000 psi
14 to 40 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
3300 to 10000 psi
22 to 67 MPa
Tensile
Modulus (psi)
ASTM D638
160000 to370000 psi
1.1 to 2.5 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
160000 to 390000 psi
1.1 to 2.6 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
0.95 to 7.0 ft lb/in of notch
To go to Izod Values,
click on
Izod
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Hardness
Rockwell ASTM D785
M50 to 82; L60
--
Shore D65 ASTM
D2240/D2583
---
Coefficient
of Linear Thermal Expansion
(10 exp-6 )in/in/C
44.2 (10 x exp –6) in/in /C
0.000 044 in/in /C
Deflection
Temperature under flexural load (F)
ASTM D648
264 psi ---
170 to 205 F
66 psi ---
165 to 200 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
1.03 to 1.06
To go to Density /Specific Gravity Values,
click on
Density
Water
Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- 0.05 to 0.07 %
Saturation
--- %
Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
--- 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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