The silicone molecule – quartz with a
flexible backbone
You can think of silicones as organically modified quartz where two of the
oxygen atoms attached to every silicon atom have been replaced with organic
groups. In polydimethylsiloxane (the basic and most commonly available
silicone), these organic groups are methyl (CH3).
This substitution transforms the rigid, three-dimensional network structure
of quartz into a strong, yet flexible, linear polymer in which the organic
groups rotate freely about the Si-O-Si chain.
Quartz
Durable, Hard, Inflexible "Rock" |
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| | Polydimethylsiloxane (PDMS)
Flexible, Twistable Polymeric "Noodle" |
Trademarks of the silicone
(polydimethylsiloxane) molecule
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A highly open, flexible, and mobile siloxane backbone – the ability to
orient toward particular surfaces and bend without breaking
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High bond strength – stable in many different environments and under harsh
conditions
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The ability to form extremely long polymer chains and still remain
fluid
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The ability to bond with both organic and inorganic materials, creating a
bridge between them
These properties enable silicone to be used for everything from fluids and gums
to gels, elastomers, and
resins, and to meet the challenges of industries ranging from
automotive and electronics to beauty and healthcare!
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Learn more about the unique physical and chemical
properties that enable silicones to be and do so many amazing things.
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Did you know ... not all silicone molecules are linear! They
can also be cyclic, crosslinked, or resinous. Explore the range of silicone
polymer structures.
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| Did you know ... silicone, silica, and silanes
have similar names, but their structures, properties, and applications are
different! Learn more about these important branches of the silicon materials
family tree. |
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Explore your material options
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Get answers
Have a question about silicone chemistry?
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