Which of the following polymers is most suitable for manufacturing non-stick coatings on cookware, and what unique property accounts for this application?
Correct: C
Polytetrafluoroethylene (PTFE), commonly known as Teflon, is uniquely suited for non-stick coatings. Its structure consists of a carbon backbone fully shielded by fluorine atoms, making the molecule extremely nonpolar and giving it exceptionally low surface energy. This results in an extremely low coefficient of friction (making it 'slippery') and outstanding chemical inertness (resistant to almost all chemicals), as well as high thermal stability. These properties are ideal for non-stick cookware. PVC is used in pipes and insulation but is not non-stick. PAN is used for acrylic fibers. PP is a common plastic for packaging and containers, but not for non-stick coatings.