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=== Polytetrafluoroethylene (Teflon) ===
[[polytetrafluoroethylene|Teflon]] is a hydrophobic polymer composed of a carbon chain saturated with fluorine atoms. The fluorine-carbon bond is largely ionic, producing a strong dipole. The dipole prevents Teflon from being susceptible to [[Van der Waals force|Van der Waals forces]], so other materials will not stick to the surface.<ref name=teflon>{{cite web |url=http://www.sigmaaldrich.com/technical-documents/articles/material-matters/fluorinated-hyperbranched.html |title= Fluorinated Hyperbranched Polymers |last1= Mueller |first1= Anja |year= 2006 |work= Sigma Aldrich |accessdate=19 May 2013}}</ref> Teflon is commonly used to reduce friction in biomaterial applications such as in arterial grafts, catheters, and guide wire coatings.
=== Polyetheretherketone (PEEK) ===
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