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Novel water soluble chitosan derivative of dicyandiamide chitosan (DCDA-g-CS) was synthesized by grafting polymerization of dicyandiamide DCDA onto chitosan CS. The presence of a new absorption peak in the infrared region of nitrile at 2297 cm−1 and NH at 1635 cm−1 of DCDA-g-CS and the chemical shift of 13C NMR at 120 and 162 ppm due to the presence of nitrile and carbon in DCDA clearly shows that...
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