Table 2. Swelling ratio in length, λ, and Young’s modulus, E, of the gels under different pH values.

Gels	λ			E (kPa)
	pH 2	pH 7	pH 10	pH 2	pH 7	pH 10
PAAc	0.96 ± 0.01	1.01 ± 0.02	1.72 ± 0.03	40 ± 4.3	38 ± 4	20 ± 2
P(AAm-co-VI)	1.64 ± 0.02	1.02 ± 0.01	1.11 ± 0.01	30 ± 3	65 ± 5	60 ± 4
P(AAm-co-AMPS)	1.67 ± 0.02	1.75 ± 0.02	1.75 ± 0.02	32 ± 1	25 ± 1	25 ± 2