Nylon and Polyesters in the Polymeric World
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Questions and Answers

Which thermoplastic material is known for being resistant to chemicals, ultraviolet light, impact, and abrasion?

  • Nylon (correct)
  • Epoxy resin
  • Polyester
  • Polypropylene
  • What type of polymer is polyethylene terephthalate (PET or PETE)?

  • Thermoset
  • Vinyl
  • Thermoplastic (correct)
  • Elastomer
  • Which of the following synthetic materials tends to shrink away from flames and self-extinguish?

  • Polyester (correct)
  • Polypropylene
  • Epoxy resin
  • Silicone
  • What is the main characteristic of elastomers that allows them to recover when the load is removed?

    <p>Molecular chains free to straighten (A)</p> Signup and view all the answers

    Which thermoset plastic is commonly used as an adhesive or in composite materials?

    <p>Epoxy resin (C)</p> Signup and view all the answers

    What characteristic makes polypropylene useful for small components like chair casters and rollers?

    <p>Low coefficient of friction (B)</p> Signup and view all the answers

    What effect does lowering the melting temperature of a plastic have on the molecular chain?

    <p>Reduces the freedom of movement (A)</p> Signup and view all the answers

    At what temperature does a plastic solidify at its melting-point temperature?

    <p>Exactly at its melting-point temperature (B)</p> Signup and view all the answers

    What effect do plasticizers have when added to plastics that have been lowered to a brittle state?

    <p>Reduce brittleness (B)</p> Signup and view all the answers

    In which environment are plastic wastes commonly found?

    <p>Ocean surfaces (A)</p> Signup and view all the answers

    What is a characteristic of bioplastics in terms of breakdown?

    <p>Break down in industrial composting facilities (C)</p> Signup and view all the answers

    What is one advantage of recycling plastics into products like outdoor furniture and floor tiles?

    <p>Uses less energy than manufacturing new plastic (D)</p> Signup and view all the answers

    What is a major VOC irritant often found in synthetic materials?

    <p>Formaldehyde (D)</p> Signup and view all the answers

    Which type of plastic becomes soft when heated and can be remolded?

    <p>Thermoplastics (C)</p> Signup and view all the answers

    What type of plastic has cross-linked molecular chains that reduce its flexibility?

    <p>Thermoset plastics (A)</p> Signup and view all the answers

    Which synthetic material is very clear, hard, lightweight, and chemical- and weather-resistant?

    <p>Acrylics (D)</p> Signup and view all the answers

    What gives thermoplastics their flexibility?

    <p>Long, tangled chains of molecules (D)</p> Signup and view all the answers

    Which type of material is becoming more readily available as an alternative to formaldehyde-containing materials?

    <p>Low VOCs (B)</p> Signup and view all the answers

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