Kinetics and equilibria associated with the absorption and desorption of water and lithium chloride in an ethylene—vinyl alcohol copolymer
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Towards elucidation of the drug release mechanism from compressed hydrophilic matrices made of cellulose ethers. II. Evaluation of a possible swelling-controlled drug release mechanism using dimensionless analysis
2010, Journal of Controlled ReleaseCitation Excerpt :It also implies that the swelling mechanism has to be non-Fickian. This concept was initiated by the early work of Hopfenberg et al. [27–30], which reported on the constant release of a solute dispersed in a hydrophobic polymer placed in an organic solvent, referring to a phase erosion process. In the pharmaceutical field, there were several early reports of anomalous drug transport published [25,31–33].
Humidity-induced structural transitions in amylose and amylopectin films
2001, Carbohydrate PolymersCitation Excerpt :Tg has also been observed to increase with increasing degrees of crystallinity for linear synthetic polymers with anhydrous crystalline regions (Jin, Ellis & Karasz, 1984). The effect has been explained by a stiffening effect of dispersed microcrystalline cross-links, which leads to less mobility of the chain segments in the connecting amorphous regions (Gaeta, Apicella & Hopfenberg, 1982; Slade & Levine, 1991). The increase in Tg for increasing crystallinity in the amylopectin films also means in practice that, the more crystalline the films were, the less sensitive they were to the surrounding RH, i.e. less sensitive to water.
Glass Transitions and Water-Food Structure Interactions
1995, Advances in Food and Nutrition ResearchCellulose xanthide (CellX) as an encapsulating matrix. I. Comparison with starch xanthide (StX) on swelling and release properties
1993, Journal of Controlled ReleaseWater relationships in starch transitions
1993, Carbohydrate Polymers
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Present address: American Can Co., Barrington Technical Center, Barrington, IL 60010 (U.S.A.).
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Present address: Istituto di Principi di Ingegneria Chimica, Università di Napoli, Piazzale Tecchio, Naples (Italy).