Abstract
The volume fraction of the water-filled pores in the microcapsule membranes was calculated and the values from 0.55 to 2.5% were obtained. Differential scanning calorimetry of aqueous suspensions of microcapsules showed no structured water present in the ethyl cellulose membranes. The temperature effect on the apparent diffusion coefficient of a drug was investigated and the apparent activation energy of diffusion was calculated.
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