Silicones

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Silicones

• By Guillermo Frausto
• ME 3344

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What are Silicones?

• are synthetic polymers with a linear, repeating
  silicon-oxygen backbone
• Silicone polymers do not have carbon as part of
  the backbone structure
• Have a high melting and boiling point
• Depending on the number of repeat units in the
  polymer chain and the degree of cross-linking,
  six classes of commercially important products
  can be produced
• Some disadvantages of Silicone are increased
  costsand lower mechanical property values when
  compared to carbon based materials

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Forms Compositions

• Fluids, Emulsions, Compounds, Lubricants, Resins
  and rubbers
• Varies from liquid to gel, or rubber to hard
  plastic
• odorless and colorless, water resistant, chemical
  resistant, oxidation resistant, stable at high
  temperature, and have weak forces of attraction,
  low surface tension, low freezing points and do
  not conduct electricity
• seem to be impervious to the effects of aging,
  weather, sunlight, moisture, heat, cold, and some
  chemical assaults

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Silicone Products

• Caulking
• Breast implants
• Lubricants
• Adhesives
• Sealants
• Gaskets
• Silly putty
• Few thousand other forms

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Resources

• http//en.wikipedia.org/wiki/Silicone
• http//www.dowcorning.com/content/sitech/sitechbas
  ics/silicones.asp
• http//www.silicone-review.gov.uk/silicone/index.h
  tm