GPC of pPrMeOx homopolymers was also performed on an alternative GPC system, Malvern GPCMax system (Malvern, UK) with a VE 3580 RI detector, PSS Polymer Standard Service (Mainz, Germany); two Malvern LC4000L column: 300×8 mm (exclusion limit: 400 kDa). Chloroform was used as the eluent with a 100 μL sample volume injection. The columns were kept at 35 °C and flow rate was 1 mL/min. Prior to each measurement, samples were dissolved in chloroform and filtered through 0.2 μm PTFE filters, Roth (Karlsruhe, Germany). Conventional calibration was performed with polystyrene standards (1.2-40 kDa) and data was processed with OmniSEC software.