The optimal conditions of preparing EHCs (Mn = 1.9 · 105) were determined on the basis of orthogonal tests. NH2% of EHCs was tested by Potentiometric titration.
The optimal conditions of preparing EHCs(Mn = 1.9 · 105) were determined on the basis of orthogonaltests. NH2% of EHCs was tested by Potentiometrictitration.