amount of MC increases, the cumulative release has
decreased due to lesser swelling of the MC chains than
NaAlg. This is due to the fact that as the amount of MC
increases in the blend matrix the hydrophobicity of the
blend decreases because of the presence of methyl groups
in MC as well as lesser number of the residual –OH groups,
which make the blend to increase the hydrophobicity to
decrease the release rates. Thus, a regaining-type response
of the polymeric chains is possible due to the stresses
induced by the surrounding solvent media during dissolution,
resulting in a decrease of chain dimension (radius of
gyration) of the polymer; this will further decrease molecular
volume of the hydrated polymer due to decreased swelling
ofMC component of the blend matrix, thereby reducing
the free volume space of the blend matrix. Notice that the
nature of release profiles remains almost identical in all
the formulations containing different amounts of GA, indicating
a linear relationship with the drug release profiles.