REVISION QUESTIONS – PROPERTIES OF PLASTICS
1. What is meant by the term “synthetic” in synthetic fibre?
2. State three properties of plastics.
3. Give three uses of plastics related to their properties.
4. Give two advantages and two disadvantages of natural materials.
5. Give two advantages and two disadvantages of synthetic materials.
6. What is meant by biodegradable?
7. What is meant by thermoplastic?
8. What is meant by thermosetting?
9. Name the toxic gases produced when each of the following plastics burn.
(i)
polythene
( ii )
polyvinyl chloride (P.V.C.)
( iii )
polystyrene
10. Kevlar is a recently developed polymer.
(a) State a useful property of Kevlar.
(b) The monomers used to make Kevlar have the following structural formulae.
Why are these molecules able to take part in condensation polymerisation?
11. Nylon is a polymer. The monomers shown below are used to produce a nylon.
(a) Draw a section of the polymer showing the three monomer units linked together.
(b) What feature of their structure makes these molecules suitable for use as monomers?