The highly viscous sample was loaded in a liquid state NMR tube by loading it first in a syringe and pushing it through an HPLC tube. The NMR tube was closed and mixed thoroughly by repeated heating/vortexing cycles to remove the air bubbles. After equilibration for 48h, 100µl of 5wt% of LAP solution in D2O was added on top of the sample and left for two days for further equilibration. Polymerization of the sample was performed as described above. The solvent peak of D2O at 4.75 ppm was used to calibrate the spectra. As a control sample, 1 H NMR of HEA/LAP