Polymer trade names and chemistry: “Neoprene” is the commercial/trade name for which polymer?

Introduction / Context:
Trade names are prevalent in polymer technology. Mapping them correctly to the underlying polymer chemistry is essential for materials selection and understanding performance in service.

Given Data / Assumptions:

• “Neoprene” is a widely used synthetic rubber for oil- and weather-resistant applications.
• Question asks for the corresponding polymer identity.

Concept / Approach:
Neoprene is polychloroprene, formed by free-radical polymerization of chloroprene (2-chloro-1,3-butadiene). The presence of chlorine imparts improved resistance to oils, ozone, and aging compared to natural rubber.

Step-by-Step Solution:
Recall common trade name pairs → Neoprene ↔ polychloroprene.Select option “Polychloroprene”.

Verification / Alternative check:
Standard materials handbooks list Neoprene as polychloroprene.

Why Other Options Are Wrong:

• Polyurethane and phenol–formaldehyde are different classes (thermoset elastomer/foam and thermoset resin).
• SBR and NBR are different elastomers with distinct monomers and properties.

Common Pitfalls:
Confusing SBR (general-purpose tire rubber) or NBR (oil-resistant nitrile) with Neoprene, which is chlorine-containing.

Final Answer:
Polychloroprene