Polymer size distributions were also measured on a Tosoh HLC-8320GPC system operated by EcoSEC software, equipped with an autosampler, a PSS GRAM 10 μm guard column (50 x 8 mm), followed by three PSS GRAM analytical 10 μm columns (300 x 8 mm) with varying porosity (100 Å, 3000 Å and 3000 Å) coupled to a refractive index detector and UV detector. It used DMF as eluent with 0.01 mol/L LiBr (to destabilize hydrogen bonding interactions between polymer chains) at 50°C with a flow rate of 1 mL/min. The calibration was performed with linear narrow poly(methyl methacrylate) (PMMA) standards from PSS Laboratories in the range of 1010 to 1.591 x 10 6 g/mol molar masses.