A tennis racquet frame is a composite made from carbon fibres and a polymer.
What is the job of the polymer in the racquet frame?
It acts as the reinforcement that makes the carbon fibres stronger.
It forms a coating that stops the carbon fibres corroding.
It reacts with the carbon fibres to form a new compound.
It acts as the matrix that binds the carbon fibres together.
118 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.