Table 1.
Intrinsic viscosity, (η), of chitosans in 0.25 M HAc/0.25 M NaAc, viscosity-average molecular weight, M v, and average number of chain scissions, α, for the fragments prepared by hydrolysis fragmentation of 1.0% chitosan at different reaction times with 0. 5 M HCl at 65°C.
| Chitosan sample | Reaction time (min) | (η) (dL/g) | M v (kDa) | α |
|---|---|---|---|---|
| Original | — | 14.37 | 2038 | — |
| F1 | 13 | 8.68 | 1076 | 0.89 |
| F2 | 35 | 6.25 | 710 | 1.87 |
| F3 | 62 | 4.68 | 493 | 3.13 |
| F4 | 128 | 2.93 | 272 | 6.49 |
| F5 | 212 | 2.26 | 196 | 9.42 |
| F6 | 300 | 1.89 | 156 | 12.06 |
| F7 | 480 | 1.32 | 99.2 | 19.50 |
| F8 | 675 | 1.28 | 95.5 | 20.45 |
| F9 | 1320 | 1.23 | 90.8 | 21.44 |
| F10 | 2160 | 1.05 | 73.8 | 26.24 |