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Silicone Elastomer (   )

Material Information

Buy Silicone Elastomer on-line

We stock and supply the following standard forms:
Film Rod Sheet Tube
Film Rod Sheet Tube

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Common Brand Names:
Silastic, Silopren
 
General Description:  

General Description : Relatively expensive synthetic elastomers which are used in a range of formulations tailored to the needs of individual end-uses. Their natural color is off-white/yellowish but formulations often include opaque, colored fillers. Although relatively weak at ambient temperatures, their retention of properties and overall performance at both higher and lower temperatures is very good - and can, to some extent, be moved in either direction by formulation. They have very good chemical and UV resistance but can be prone to (slow) hydrolysis in high pressure steam and in the absence of oxygen at high temperatures. They are also very permeable to gases.

Industrial applications include seals, O-rings etc., linings, insulation, modelling/casting moulds or impressions, permeable membranes and automobile and aerospace applications.

   

Chemical Resistance

Acids - concentrated Good-Poor
Acids - dilute Good-Poor
Alcohols Good-Fair
Alkalis Good-Fair
Aromatic hydrocarbons Poor
Greases and Oils Good-Poor
Halogenated Hydrocarbons Poor
Halogens Poor
Ketones Poor

Electrical Properties

Volume resistivity ( Ohmcm ) 1018-10210

Mechanical Properties

Elongation at break ( % ) 200-800
Hardness - Rockwell 60 degrees Shore A
Tensile strength ( MPa ) 6.5

Physical Properties

Density ( g cm-3 ) 1.1 - 1.5
Radiation resistance Poor

Thermal Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 250-300
Lower working temperature ( C ) -70 to -50
Specific heat ( J K-1 kg-1 ) 1300 - 1500
Thermal conductivity @23C ( W m-1 K-1 ) 0.22
Upper working temperature ( C ) 200-260

Properties for Silicone Elastomer Film

Property Value
Permeability to Carbon Dioxide @25C x10-13 cm3. cm cm-2 s-1 Pa-1 2500
Permeability to Hydrogen @0C x10-13 cm3. cm cm-2 s-1 Pa-1 400
Permeability to Nitrogen @0C x10-13 cm3. cm cm-2 s-1 Pa-1 200
Permeability to Oxygen @0C x10-13 cm3. cm cm-2 s-1 Pa-1 400
Permeability to Water @25C x10-13 cm3. cm cm-2 s-1 Pa-1 32000

Buy Silicone Elastomer on-line

We stock and supply the following standard forms:
Film Rod Sheet Tube
Film Rod Sheet Tube

Choose a form to search our on-line catalog  

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