Polymethyl methacrylate (PMMA), a transparent thermoplastic used for glazing and lenses, is commonly marketed under which trade/commodity name?

Introduction / Context:
PMMA is a key optical plastic replacing glass in many applications due to clarity, weatherability, and ease of fabrication. Connecting polymer names to their commercial aliases avoids design errors and ensures correct material specifications for optical and structural components.

Given Data / Assumptions:

• Target polymer: PMMA (polymethyl methacrylate).
• Applications: signage, lenses, aquaria, glazing.
• Trade names vary regionally (e.g., Perspex, Plexiglas, Acrylite).

Concept / Approach:

Perspex (also Plexiglas) denotes PMMA. It offers high light transmission, good surface hardness for a plastic, and good UV resistance, distinguishing it from PTFE (Teflon), melamine/phenolic resins (Bakelite systems), or aliphatic polyamides like nylon-6.

Step-by-Step Solution:

Verification / Alternative check:

Material datasheets and vendor catalogs list Perspex and Plexiglas as PMMA grades with optical properties near glass level transmission (~92%).

Why Other Options Are Wrong:

Bakelite: Phenol–formaldehyde thermoset; opaque and brittle. Teflon: PTFE; exceptional chemical resistance and low friction, not a transparent glazing plastic. Nylon-6: Engineering polyamide, not primarily an optical glazing polymer.

Common Pitfalls:

Assuming any clear plastic is polycarbonate; confusing brand names across regions.

Final Answer:

Perspex