Table 3. The pH and viscosity of drug-free polymeric gel (mean ± SD, n = 3).

Film composition	SA	PC	SA-PC	SA-CS	PC-CS	NaCMC	SA-NaCMC	PC-NaCMC	CS	NaCMC-CS	PF-127	SA-PF127	PC-PF127
pH	6.35 ± 0.04	3.74 ± 0.06	5.05 ± 0.07	7.66 ± 0.07	4.51 ± 0.07	6.20 ± 0.06	6.72 ± 0.03	5.23 ± 0.1	-	8.19 ± 0.06	6.86 ± 0.06	6.18 ± 0.06	3.56 ± 0.07
Viscosity (mPa-s)	5396 ± 307.72	326 ± 15.10	1974 ± 21.63	726 ± 15.87	58 ± 3.46	-	-	-	-	-	3.8 ± 1.39*	594 ± 6.00*	86 ± 3.46*

All the gel samples were sheared continuously at a rate of 100 rpm for 1 min with spindle LV-4 (64) except the asterisks (*) represent gel samples that sheared continuously at a rate of 200 rpm for 1 min with spindle LV-3 (63).