Table 1.

Perez model parameters for PU and PU-10% and PU-20% of diclofenac at different release times at the flow rate of 7.5 mL/s (f = 1 Hz).

Samples	${\mathit{E}}_{\mathbf{\infty }}$ (MPa)	${\mathit{E}}_{\mathbf{0}}$ (MPa)	$\mathit{k}$	${\mathit{k}}^{\mathbf{\prime }}$	$\mathit{Q}$	$\mathit{\tau }$ (s)
PU-Pure-0 h	16	2690	0.41	0.23	2	0.5
PU-10%-0 h	14	2200	0.4	0.25	1.2	1
PU-10%-12 h	13	1715	0.37	0.24	2	2
PU-10%-24 h	12	1519	0.37	0.25	2.4	3
PU-10%-96 h	11	1100	0.45	0.3	3	4
PU-20%-0 h	14	2050	0.24	0.3	2	5
PU-20%-12 h	12	1368	0.24	0.34	2	6
PU-20%-24 h	10	1180	0.24	0.34	2	7
PU-20%-96 h	7	1040	0.25	0.35	2	8