Table 2.
Effect of AA and MBA ratio on GCP, % GCE and water Absorbency (SEQ).
| Grafting parameter | AA content (% v/v) | MBA content (% w/v) |
||||
|---|---|---|---|---|---|---|
| 0.250 | 0.375 | 0.500 | 0.625 | 0.750 | ||
| GCP | 4.50 | Weak | 72 (6.0) | 126 (5.1) | 167 (5.0) | 218 (11.0) |
| 5.75 | 174 (9.5) | 214 (11.5) | 253 (14.5) | 302 (11.0) | 346 (12.5) | |
| 6.75 | 265 (12.6) | 295 (12.0) | 371 (16.0) | 433 (12.6) | 552 (17.5) | |
| 7.75 | 290 (13.5) | 333 (16.0) | 413 (13.5) | 458 (12.5) | 567 (23.0) | |
| 9.00 | 553 (21.5) | 557 (20.5) | 559 (23.5) | 565 (24.5) | 693 (22.0) | |
| % GCE | 4.50 | Weak | 41 (0.6) | 68 (2.1) | 78 (3.1) | 83 (0.6) |
| 5.75 | 72 (2.5) | 77 (2.6) | 80 (3.5) | 86 (1.0) | 89 (2.0) | |
| 6.75 | 76 (2.4) | 80 (2.5) | 85 (3.6) | 95 (2.1) | 97 (1.0) | |
| 7.75 | 69 (3.5) | 74 (1.6) | 83 (3.0) | 85 (2.5) | 97 (2.5) | |
| 9.00 | 52 (2.1) | 58 (2.5) | 60 (3.1) | 74 (4.0) | 82 (2.1) | |
| SEQ | 4.50 | Weak | 33 (3.1) | 55 (2.1) | 42 (1.5) | 41 (4.4) |
| 5.75 | 99 (1.2) | 104 (3.5) | 100 (3.5) | 85 (3.6) | 69 (1.5) | |
| 6.75 | 142 (5.0) | 151 (3.0) | 156 (5.3) | 139 (2.5) | 95 (2.1) | |
| 7.75 | 139 (2.0) | 145 (1.5) | 107 (4.0) | 98 (1.6) | 79 (1.0) | |
| 9.00 | 121 (3.5) | 120 (2.2) | 108 (3.6) | 77 (2.7) | 68 (2.6) | |
Notes: The values in parentheses are standard deviations (n = 3), reaction conditions; Degree of neutralization = 80 %, temp. = 80 °C, cellulose = 2 % w/v, APS = 0.25 % w/v, vol. = 40 mL, time = 2 h.