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 2

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

Hydrogels	Monomer feed rates (%)	VPTT (°C)	Swelling ratio, (g H2O/g polymer)
P(NIPA)	—	24	38
NIPA/AA/NTBA	50/10/40	17	37
NIPA/AA/NTBA	50/40/10	39	51
NIPA/MMA/AA	50/10/40	52	27
NIPA/MMA/AA	50/40/10	30	14
NIPA/MMA/NTBA	50/10/40	24	20
NIPA/MMA/NTBA	50/40/10	23	14