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Polydimethylsiloxane (PDMS) belongs to a group of polymeric organo-silicon compounds that are commonly referred to as silicones. PDMS is non-toxic, optically clear, bio compatible, flexible and chemically stable. The PDMS chemical structure can be represented as:
PDMS can be synthesized with a variety of end groups suitable for a wide variety of applications. The PDMS used in soft lithography, in particular, is methyl group terminated. In addition the base polymer is available in different molecular weights and viscosities. LNF stocks Sylgard 184 (from Dupont Corp.) which has a viscosity in the 4000 - 6500 cSt.
PDMS is Processed in Solvent Bench 94. See PDMS Process
The SOP explains in detail how to mix, cure and spin PDMS in LNF
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