Table 3: The volume phase transition temperature (VPTT) and the swelling equilibrium values () of hydrogels containing 60% NIPA.

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

NIPA/AA/NTBA60/10/302337
NIPA/AA/NTBA60/30/103433
NIPA/AA/NTBA60/20/202546
NIPA/MMA/AA60/30/102716
NIPA/MMA/AA60/10/302729
NIPA/MMA/AA60/20/202523
NIPA/MMA/NTBA60/30/102314
NIPA/MMA/NTBA60/10/302315
NIPA/MMA/NTBA60/20/202217