Figure 4. Polymer functionalization.

(a) Continuous-flow chloromethylation by an automated μ-TES (CMME generation (6 min), distilled separation (3 min), in situ consumption (times in the graph) and quenching/separation step (30 s)); (b) chloromethylation of polysulphone polymer (CPS) reaction condition: Polysulphone (1.2 gm in 10 ml THF solution, flow rate=160 μl min⁻¹), ZnCl₂ in THF solution (0.05 M in THF, flow rate=14 μl min⁻¹), CMME flow rate=17.0±0.5 μl min⁻¹); (c) PE-A₁₆B₁₁polymer (1.0 g (fluorine unit=1.03 mmol) in 20 ml TCE solution (flow rate 101 ml min⁻¹), ZnCl₂ in THF solution (0.25 M, flow rate=11 μl min⁻¹), CMME flow rate=17.0±0.5 μl min⁻¹. The number of chloromethyl groups per repeat unit was measured by ¹H-NMR analysis and the data error is within ±1.5%.