Casting solvent effects on the permeability of polymer films of differing quaternary ammonium (cation) content
- 1 July 1987
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Pharmacy and Pharmacology
- Vol. 39 (7) , 547-548
- https://doi.org/10.1111/j.2042-7158.1987.tb03174.x
Abstract
Films of certain acrylate‐methacrylate copolymers of varying cation (quaternary ammonium) content were cast from three different solvents: acetone, chloroform, and ethanol; their permeability to urea was determined at 30 °C. In films containing 66 mole cation mol−1 polymer chain, and cast from acetone, chloroform or ethanol, the permeation rates were 480, 900 and 2807 mg h−1, respectively. Differences in permeation rates were however less significant when polymers of cation content lower than 46 mole cation mol−1 polymer chain were used to form films. This observation may relate to differences in the degree of dissociation of the polymer in the different solvents.This publication has 0 references indexed in Scilit: