1H and 13C NMR: 
 Spectra were analysed using Mestrelab MNova 11.0 software where spectra were baseline corrected and line broadening used to allow accurate integration of peak area. 
 
 GPC: 
 Chromatograms were analysed in Agilent GPC/SEC software to extract Mn and PDI values.
 
 UV-vis: 
 The presence of the SC12 end group can be monitored by the peak at 310 nm in UV-vis spectra. Resultant spectra were normalised by the styrenic absorbance peak at 262 nm.