Properties 

Liquid Silicone Rubber
/LSR
Liquid injection molding

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

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
--- C

Glass Transition (C)
Tg (Amorphous)

--- C

Processing Temperature Range Degrees F
Extrusion

--- F for Compression Molding
360 to 420 F for Injection Molding
--- F for Extrusion

Molding Pressure Range ( PSI) (ksi)
1000 to 2000 psi
1 to 2 ksi
6.7 to 13.3 MPa

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Compression Ratio
---

Mold(Linear) Shrinkage (in/in)
ASTM D955
0.000 to 0.005 in/in 

Tensile Strength at Break
ASTM D638
725 to 1305 psi
4.8  to 8.7 MPa

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Elongation at break (%)
ASTM D638
300 to 1000 %

Tensile Yield Strength (psi)
ASTM D638
--- psi
--- MPa

Compressive Strength (psi)
Rupture or Yield
ASTM D695
--- psi
--- MPa

To go to Compressive Strength Values,
click on
Compressive Strength

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Flexural Strength (psi)
Rupture or Yield
ASTM D790
--- psi
--- MPa

Tensile Modulus (psi)
ASTM D638
--- psi
--- 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
--- psi
--- 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

--- ft lb/in of notch

To go to Izod Values,
click on
Izod

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Hardness
Rockwell ASTM D785
 
--
Shore D65 ASTM D2240/D2583
A20 to 70

Coefficient of Linear Thermal Expansion
(10 exp-6 )in/in/C
 10 to 20 (10 x exp 6) in/in /C
0.000 010 to 0.000 020 in/in /C

Deflection Temperature under flexural load (F)
ASTM D648
264 psi ---
--- F
66 psi  ---
--- 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
1.08 to 1.14

To go to Density /Specific Gravity Values,
click on
Density

Water Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- --- %
Saturation 
---  %

Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
--- 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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