Table S2.

Different amount of the materials used for mPEG-g-CS synthesis

Polymer	mPEG/CS NH2 (mol/mol)	CS (mg)	M (PEG-COOH) (mg)	M (NHS) (mg)	M (EDC) (mg)
mPEG750-g-CS	0.5/1	500	1,011.5	273.91	369.47
mPEG2000-g-CS	0.05/1	500	249.9	27.39	36.95
	0.1/1	500	499.8	54.78	73.89
	0.25/1	500	1,249.5	136.96	184.74
	0.5/1	500	2,499	273.91	369.47
mPEG5000-g-CS	0.1/1	500	1,213.8	54.78	73.89

Abbreviations: CS, chitosan; mPEG, methoxy poly(ethylene glycol); NHS, N-hydroxysuccinimide.