Research Article

Collaboration between HPMC and NaCMC in order to Reach the Polymer Critical Point in Theophylline Hydrophilic Matrices

Table 2

Kinetic parameters for Davidsons and Peppas model calculated for the ternary hydrophilic matrix tablets.

Batch 𝑘 s (%minn ) 𝑛 𝑟 2

18.910.643>0.999
216.4650.498>0.999
324.8040.498>0.999
413.7980.5580.999
55.4770.6820.999
720.3710.6120.999
810.1620.6430.999
94.1560.741>0.999
129.2880.6430.999
1326.8860.588>0.999
1613.3690.643>0.999

𝑘 s (%minn ): kinetic constant of water penetration; 𝑛 : Exponent which depends on the water penetration mechanism.