GCSE_Unit 5D_Working with Polymers

What term correctly describes the separation of by-products from crude oil?

• Polymerisation

• Polymerisation

• Refining

• Fractional distillation

Which one of the following is a sustainable material?

• Bioplastic

• Gas

• Coal

• Oil

Which adhesive is best for glueing plastics together

• Solvent cement

• PVA

• Contact adhesive

• Epoxy resin

What two things are required to break down the large hydrocarbons to smaller, more useful molecules?

• Heat

• Gas

• Pressure

• Hydrogen

Select two distinctive features of thermoplastic molecules

• Long chains tangles together

• Lots of cross links

• No fixed pattern

• Long chains in straight lines

Thermoplastics have a degree of shape memory. State what is meant by ‘shape memory’ in this context?

• When they are reheated they try to return to their original shape (unless overheated or overstretched)

• When they are reheated they cannot return to their original shape (unless overheated or overstretched)

What distinctive features does a thermosetting molecular structure have?

• Crossed Linked

• More flexible structure

• permanently stiff molecular structure once set

• semi-permanent stiff molecular structure once set

Study the child carrier seat for bicycles shown below. Polypropylene has been used to make the product. Give 4 reasons for this choice.

Evaluate responses using AI:

OFF

Polypropylene is the material used to make the child carrier seat. Justify one additive that could be added to the polypropylene to enhance its properties

Evaluate responses using AI:

OFF

Molecules of ………………compounds known as monomers join together to form long chains of molecules called ……………….These atoms are joined end to end to form ………………