The polymerisation product of C2F4 (tetrafluoroethylene) is PTFE. What is the well-known commercial name for this fluoropolymer?

Introduction / Context:
PTFE (polytetrafluoroethylene) is a high-performance fluoropolymer prized for chemical inertness, low surface energy (non-stick), and excellent dielectric properties. The most recognised trademark for PTFE is Teflon.

Given Data / Assumptions:

• Monomer: tetrafluoroethylene (TFE), formula C2F4.
• Resulting polymer: PTFE.

Concept / Approach:
Brand recognition helps avoid material confusion in specifications. PTFE is not polyurethane, silicone rubber, or an epoxy; it is a distinct thermoplastic processed by sintering and paste extrusion due to its high melt viscosity.

Step-by-Step Solution:
Match PTFE to trademark: Teflon.Eliminate unrelated polymer families (PU, silicone, epoxy).

Verification / Alternative check:
Supplier catalogs present PTFE under the Teflon trademark for non-stick coatings and components.

Why Other Options Are Wrong:
They name different polymers with different chemistries and uses.

Common Pitfalls:
Confusing PTFE with PFA or FEP; these are related fluoropolymers with melt-processability.

Final Answer:
Teflon