Plastics - Topic 4.2d

True or False - Animal horn, Amber and Wax are all examples of naturally occurring plastics

• True

• False

What is an example of a semi-synthetic plastic?

• Epoxy, which is commonly used as an adhesive and matrix for composites

• Polyvinyl chloride, which is commonly used to make pipes, doors and windows

• Celluloid acetate, which was used to make cinema film, buttons, spectacle frames

True of False - Bakelite was the first truly synthetic plastic commonly used to make radios and telephones

• True

• False

True or False - Not all plastics are polymers

• True

• False

True or False - Not all plastics are polymers

• True

• False

Which is the most common material used to make plastics

• Natural gas

• Crude oil

• Coal

The chemical building blocks for making plastic comes mainly from ....

• Petrol

• Parafin

• Naphtha

• Gas

Which statement defines a polymer?

• A polymer is a very large, chain-like molecule made up of polymers, which are large molecules.

• A polymer is a very small, chain-like molecule made up of monomers, which are large molecules. It can only be synthetic.

• A polymer is a very large, chain-like molecule made up of monomers, which are small molecules. It can be naturally occurring or synthetic.

Reheating a __________ plastic component will cause the forces between the molecules to become weaker which allows them to slip over each other - the component can be reshaped or become mis-shaped in use if it becomes too hot.

• thermoplastic

• thermosetting plastic

Which type of plastic has molecules that are not cross linked?

• Thermoplastic

• Thermosetting plastic