A manufacturer makes two batches of poly(ethene) from ethene. Test pieces with identical dimensions are cut from each batch.
| Batch | Density in kg/m³ | Force needed to break the test piece in N |
|---|---|---|
| A | 920 | 18 |
| B | 960 | 31 |
Explain which batch was made at a lower temperature and pressure using a catalyst. Use the data and the arrangement of the polymer chains in your answer.
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.