Chemistry Reference
In-Depth Information
Fig. 5.8
The feasible pathways of modification of polysaccharides with GMA: (
a
) transester-
ification and (
b
) open epoxy ring mechanism [
92
]
Fig. 5.9
Strategies for modification of xanthan: (
a
) acrylic acid, (
b
) acryloyl chloride, and (
c
)
maleic anhydride [
93
]
effective carriers, filter aid agents, cationic flocculant, and additives of fine
chemicals [
96
,
97
]. Compared with the natural cationic polysaccharide chitosan,
the ionization degree of cationic derivatives of gum is almost independent of pH
owing to the presence of cationic substituents that cannot be protonated. Currently,
