2.6. Molecular weight measurement
Molecular weight of neat PLA and PLA/NR blends, before and after degradation, was performed by gel permeation
chromatograms (GPC, 20AD, Shimadzu). The GPC system was calibrated using Agilent Company’s mono-disperse polystyrene standards, KF-805 and KF-802 columns were running in series. Chloroform was used as mobile phase at a flow rate of 0.8 mL/min at 36 C.