Table 2: The volume phase transition temperature (VPTT) and the swelling equilibrium values () of hydrogels containing 50% NIPA and P(NIPA).

HydrogelsMonomer feed rates (%)VPTT (°C)Swelling ratio, (g H2O/g polymer)

P(NIPA)2438
NIPA/AA/NTBA50/10/401737
NIPA/AA/NTBA50/40/103951
NIPA/MMA/AA50/10/405227
NIPA/MMA/AA50/40/103014
NIPA/MMA/NTBA50/10/402420
NIPA/MMA/NTBA50/40/102314