Thermoplastics; uses

Question 1

Thermoplastics…
What are they
Properties

Answer 1

Polymer chains with no cross links
Self finishing, self colouring
Recyclable, remouldable

Question 2

Why might polypropylene be used for a chair?

Answer 2

Polypropylene is a thermoplastic so can be injection moulded.
Polypropylene is a relatively flexible polymer so it will give when people stretch and lean back on the chair.
PP is a tough polymer that will withstand a good amount of wear and tear through use and should not break if the chair is tipped over.
Chemical / water resistance making it easier to clean.
Polypropylene like all polymers can be coloured with a pigment to improve the aesthetic qualities of the product.

Question 3

Why is ABS used in mobile phone cases?

Answer 3

It is a suitable material for this application as it can be injection moulded, allowing the production of complex 3D forms with varying wall thicknesses.
Due to its toughness it is resistant to the impacts associated with dropping mobile phones.
It is available in a wide range of colours allowing the product range to be expanded and appeal to a wider range of consumers.