15. POLYMERS (HM)
Explanation:
A thermoplastic is a polymer that becomes pliable or moldable above a specific temperature and returns to a solid state upon cooling. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes. Polyethylene is a lightweight, durable thermoplastic with a variable crystalline structure. Polyethylene terephthalate or Terylene is the most common thermoplastic polymer resin of the polyester family and is used in fibers for clothing, containers for liquids, and foods. All the given compounds are thermoplastic polymers.
