title: Basic butylated methacrylate copolymer/kappa-carrageenan interpolyelectrolyte complex: preparation, characterization and drug release behaviour.
abstract: The formation of a novel interpolyelectrolyte complex (IPEC) between basic butylated methacrylate copolymer and kappa-carrageenan was investigated and the product formed was characterized. Turbidity measurements and elemental analyses pointed to a 1:1 interaction of the repeating units. These results and FT-IR confirmed IPEC formation. Electronic microscopy images, particle size determination by image analysis and N(2) (77K) adsorption measurements were consistent with a porous material. This IPEC formed presented very good flowability and compactibility. Two maxima were observed in the swelling behaviour as a function of pH. The performance of the IPEC as a matrix for controlled release of drugs was evaluated, using ibuprofen as a model drug. Release profiles were properly represented by a mathematical model, which indicates that the system releases ibuprofen in a zero-order manner. These profiles could be controlled by conveniently modifying the proportion of the IPEC in the tablets.
authors.affiliation: Departamento de Química Orgánica, Universidad de Buenos Aires, Buenos Aires, Argentina.
authors.forename: H J
authors.initials: HJ
authors.lastname: Prado
authors.forename: M C
authors.initials: MC
authors.lastname: Matulewicz
authors.forename: P
authors.initials: P
authors.lastname: Bonelli
authors.forename: A L
authors.initials: AL
authors.lastname: Cukierman
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry*; D002351:Carrageenan / Q000138:chemical synthesis*; D002626:Chemistry, Pharmaceutical; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D004339:Drug Compounding; D006863:Hydrogen-Ion Concentration; D007052:Ibuprofen / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D010316:Particle Size; D011109:Polymethacrylic Acids / Q000138:chemical synthesis*; D016062:Porosity; D012995:Solubility; D013499:Surface Properties; D013607:Tablets; D013678:Technology, Pharmaceutical / Q000379:methods
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D011109:Polymethacrylic Acids; D013607:Tablets; D002351:Carrageenan; C518398:Eudragit E PO; D007052:Ibuprofen