Trade names for polymethyl methacrylate (PMMA): which of the following is NOT a commercial name for PMMA?

Introduction / Context:
Recognising polymer trade names prevents mis-specification during procurement and design. PMMA is marketed widely as Perspex, Lucite, or Plexiglass for transparent glazing. Teflon, however, refers to a completely different polymer family with distinct properties and applications.

Given Data / Assumptions:

• PMMA = Perspex/Lucite/Plexiglass.
• Teflon = PTFE (polytetrafluoroethylene), a fluoropolymer.

Concept / Approach:
PMMA is an acrylic thermoplastic known for optical clarity and scratch resistance; PTFE is a fluoropolymer known for low friction and extreme chemical resistance. Confusing them can lead to severe performance mismatches in temperature resistance, friction, and processability.

Step-by-Step Solution:
Identify PMMA trade names: Perspex, Lucite, Plexiglass.Identify outlier: Teflon (PTFE), not PMMA.

Verification / Alternative check:
Supplier catalogs list PMMA under these trade names for panels and displays; Teflon products are PTFE sheets, rods, and coatings.

Why Other Options Are Wrong:
They are widely accepted PMMA trade names.

Common Pitfalls:
Assuming transparency implies PMMA; polycarbonate is also transparent but sold as Lexan/Makrolon.

Final Answer:
Teflon