Table 4: The volume phase transition temperature (VPTT) and the swelling equilibrium values () of hydrogels containing 80% NIPA.

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

NIPA/NTBA/AA80/15/52529
NIPA/NTBA/AA80/10/103137
NIPA/NTBA/AA80/5/153035
NIPA/MMA/AA80/15/52734
NIPA/MMA/AA80/10/104536
NIPA/MMA/AA80/5/154233
NIPA/MMA/NTBA80/15/52421
NIPA/MMA/NTBA80/10/102030
NIPA/NTBA/MMA80/5/152026