Abstract
Hydrogels are hydrophilic polymers that swell to an equilibrium volume in the presence of water but preserve their shape. The dynamic swelling behavior of poly(acrylic acid-co-acrylamide) copolymers, at 37 °C, was investigated. It was observed that the liberation mechanism was non-Fickian. Diffusion coefficients according to Ficks law as a function of concentration of N,N′-methylenebisacrylamide and results on the effects of crosslink density on the release of theophylline are reported.
| Original language | English |
|---|---|
| Pages (from-to) | 559-566 |
| Number of pages | 8 |
| Journal | Polymer Testing |
| Volume | 18 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Oct 1999 |
| Externally published | Yes |