A manufacturer tests two polymer samples for use as positioning blocks in a process where components are heated.
| Polymer sample | Observation at room temperature | Observation when heated to 120 °C |
|---|---|---|
| P | Rigid | Softens and can be reshaped |
| Q | Rigid | Remains rigid and keeps its shape |
Explain which polymer sample has a thermosetting structure. Predict whether a damaged positioning block made from this sample could be reshaped by heating.
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.