. 2023 Aug 14;9(8):655. doi: 10.3390/gels9080655

Table 2.

The kinetic data fitted on different mathematical models for: the first stage (5 min–1 h), the second stage (3–8 h), and the third stage (1–6 days).

	Zero Order		First Order		Higuchi		Korsmeyer–Peppas			Hixson–Crowell
Code	Zero Order		First Order		Higuchi		Korsmeyer–Peppas			Hixson–Crowell
First stage	R²	K₀	R²	K	R²	K_H	R²	K	n	R²	K
PVA/GX-80/20-1	0.985	44	0.997	0.72	0.996	58	0.998	55	0.53	0.995	−0.94
PVA/GX-80/20-2	0.978	42	0.943	0.42	0.96	48	0.975	40	0.66	0.969	−0.83
PVA/GX-80/20-3	0.973	19	0.99	0.26	0.993	34	0.991	28	0.63	0.989	−0.37
Second stage	R²	K₀	R²	K	R²	K_H	R²	K	n	R²	K
PVA/GX-80/20-1	0.98	2.6	0.989	0.09	0.991	11	0.993	56	0.16	0.988	−0.09
PVA/GX-80/20-2	0.992	3.3	0.983	0.09	0.999	15	0.999	44	0.26	0.998	−0.1
PVA/GX-80/20-3	0.989	2.4	0.995	0.05	0.998	11	0.999	38	0.22	0.994	−0.06
Third stage	R²	K₀	R²	K	R²	K_H	R²	K	n	R²	K
PVA/GX-80/20-1	0.96	0.09	0.995	0.01	0.991	1.5	0.998	69	0.07	0.995	−0.008
PVA/GX-80/20-2	0.900	0.08	0.948	0.009	0.95	1.9	0.983	59	0.09	0.930	−0.007
PVA/GX-80/20-3	0.989	0.09	0.994	0.003	0.999	1.4	0.993	49	0.07	0.993	−0.003

R²: correlation coefficient; K: proportionality constant; n: release exponent.