Table 3. Parameters generated from fitting the Equation 13 to experimental data of optical density variation in PNIPA/AA nanohydrogel suspensions as a function of temperature.
| Nanohydrogel | Tm (K) |
 (KJ mol−1) |
 (KJ mol−1 K−1) |
r2 |
| PNIPA(3) | 304.34±0.27a , α | 382.16±44.95a , α | 23.28±24.89a , α , n.s. | 0.9990 |
| PNIPA(5) | 311.67±0.62a , β | 172.34±9.79a , β | 3.19±4.06a , α , n.s. | 0.9990 |
| PNIPA-10AA(3) | 305.08±4.85a , α | 143.29±93.44b , α , n.s. | −5.59±8.56ab , α , n.s. | 0.9987 |
| PNIPA-10AA(5) | 303.59±0.92b , α | 190.33±28.89a , α | −6.66±7.15a , α , n.s. | 0.9996 |
| PNIPA-20AA(3) | 300.41±0.58a , α | 239.07±47.01ab , α | −17.89±3.23b , α | 0.9966 |
| PNIPA-20AA(5) | 303.27±0.89b , α | 157.51±15.38a , α | 0.23±6.04a , α , n.s. | 0.9982 |
Values reported are the means±standard deviation (n = 2).
a,b,c
Statistically significant differences (p<0.05) between gels with different acrylic acid content for the same cross-linking degree.
α,β
Statistically significant differences (p<0.05) between gels with different cross-linking degree for the same acrylic acid content.
n.s.
Parameter not significant (p>0.05).