Polydimethyl siloxane (PDMS) polymer group of organic compounds, silicon is made up of repeating units of siloxane, including a functional group of two silicon atoms and one oxygen atom in combination with the alkyl group CH3. The general formula of PDMS is CH3 [Si (CH3) 2O] NSI (CH3) 3 in which n is the number of repeating units of silanol groups [SiO (CH3) 2]
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