Fig. 5. (a) Synthesis of P3EPT–PFB and P3APT–PFB with model “click” reactions performed post-polymerization. (b) Gel permeation chromatography elugram (80 °C in chlorobenzene) of P3EPT–PFB–ODT in the thiol (purple) and disulfide (orange) forms. The dotted purple line illustrates partial reduction of the disulfide link (c) gel permeation chromatography elugram (80 °C in chlorobenzene) of P3EPT–PFB (black), mPEG–SH (red), and P3EPT-b-PEG (blue). Traces for all elugrams are obtained from a 450 nm diode array detector, except mPEG–SH which was measured using a refractive index detector.