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 4

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

Hydrogels	Monomer feed rates (%)	VPTT (°C)	Swelling ratio, (g H2O/g polymer)
NIPA/NTBA/AA	80/15/5	25	29
NIPA/NTBA/AA	80/10/10	31	37
NIPA/NTBA/AA	80/5/15	30	35
NIPA/MMA/AA	80/15/5	27	34
NIPA/MMA/AA	80/10/10	45	36
NIPA/MMA/AA	80/5/15	42	33
NIPA/MMA/NTBA	80/15/5	24	21
NIPA/MMA/NTBA	80/10/10	20	30
NIPA/NTBA/MMA	80/5/15	20	26