Table 3. The sol-gel phase transition characteristics of keto-hydrogel by rheometer and tube inversion test at 37°C.

S: solution, G: gel.

BOX copolymer	15 wt%	20 wt%	25 wt%	30 wt%	30 wt%	30 wt%
Ketorolac (mg/mL)	10	10	10	10	20	30
Sol-Gel Transition temperature (°C)	53.6	34.6	26.4	24.9	44.2	52.2
Maximal viscosity (Pa.s)	1.38	27.08	59.00	58.13	4.92	2.43
Tube inversion test at 37°C	S	G	G	G	S	S