Condensation polymers find widespread use in material science due to their distinctive mechanical properties, which are heavily influenced by the nature of the intermolecular forces between their chains.
Which of the following repeating units represents a condensation polymer that can form hydrogen bonds between adjacent polymer chains?
−[O−CH2CH2−O−C(=O)−C6H4−C(=O)]n−-\left[\text{O}-\text{CH}_2\text{CH}_2-\text{O}-\text{C}(=\text{O})-\text{C}_6 \text{H}_4-\text{C}(=\text{O})\right]_n-−[O−CH2CH2−O−C(=O)−C6H4−C(=O)]n−
−[NH−C6H4−NH−C(=O)−C6H4−C(=O)]n−-\left[\text{NH}-\text{C}_6 \text{H}_4-\text{NH}-\text{C}(=\text{O})-\text{C}_6 \text{H}_4-\text{C}(=\text{O})\right]_n-−[NH−C6H4−NH−C(=O)−C6H4−C(=O)]n−
−[O−CH(CH3)−C(=O)]n−-\left[\text{O}-\text{CH}(\text{CH}_3)-\text{C}(=\text{O})\right]_n-−[O−CH(CH3)−C(=O)]n−
−[O−CH2−C(CH3)2−CH2−O−C(=O)−C(=O)]n−-\left[\text{O}-\text{CH}_2-\text{C}(\text{CH}_3)_2-\text{CH}_2-\text{O}-\text{C}(=\text{O})-\text{C}(=\text{O})\right]_n-−[O−CH2−C(CH3)2−CH2−O−C(=O)−C(=O)]n−
11 exam-style questions on AQA A Level Chemistry Polymers (A-level only), covering Condensation polymers (A-level only) and Biodegradability and disposal of polymers (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.