Which term describes a heterogeneous system with a continuous polymeric material and a second phase distributed to create gas-filled voids?

• A. Cellular or Foamed Plastic
• B. Fire Compartment
• C. Smoke Compartment
• D. Change of Occupancy Classification

Answer: (A)

The main idea here is identifying a material structure where a continuous polymer matrix contains dispersed gas-filled voids, forming a foam. That description matches cellular or foamed plastic, where gas pockets create the foam’s characteristic cells within the polymer. This term is used to describe plastics that have these gas-filled voids, whether open-cell or closed-cell, which affects properties like insulation and density. The other options refer to spatial safety concepts rather than material form: a fire compartment and a smoke compartment describe enclosed areas designed to limit fire and smoke spread, respectively, while a change of occupancy classification relates to how a space is used and the associated code requirements. So the term that best fits the description of a heterogeneous system with a continuous polymer and dispersed gas-filled voids is cellular or foamed plastic.