Investigation of the Effects of Different Hydrophilic and Hydrophobic Comonomers on the Volume Phase Transition Temperatures and Thermal Properties of N-Isopropylacrylamide-Based Hydrogels

Table 3

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

Hydrogels	Monomer feed rates (%)	VPTT (°C)	Swelling ratio, (g H2O/g polymer)
NIPA/AA/NTBA	60/10/30	23	37
NIPA/AA/NTBA	60/30/10	34	33
NIPA/AA/NTBA	60/20/20	25	46
NIPA/MMA/AA	60/30/10	27	16
NIPA/MMA/AA	60/10/30	27	29
NIPA/MMA/AA	60/20/20	25	23
NIPA/MMA/NTBA	60/30/10	23	14
NIPA/MMA/NTBA	60/10/30	23	15
NIPA/MMA/NTBA	60/20/20	22	17