title: Influence of formulation variables on the morphology of biodegradable microparticles prepared by spray drying.
abstract: The preparation of microparticles of the biodegradable poly-DL-lactide (PLA) and polylactide-co-glycolide (PLGA) polymers using spray-drying technology was studied. Formulation parameters investigated include polymer type, polymer molecular weight, polymer concentration, and viscosity. Microparticles were characterized using electron microscopy, particle size analysis, and gel permeation chromatography. Kinematic viscosity was determined for each of the sprayed polymer solutions. Polymer molecular weight and polymer concentration were found to be important parameters when preparing PLA and PLGA microparticles using spray-drying technology.
authors.affiliation: Elan Pharmaceutical Technologies, Elan Research Institute, Trinity College, Dublin 2, Ireland.
authors.forename: N
authors.initials: N
authors.lastname: Clarke
authors.forename: K
authors.initials: K
authors.lastname: O'Connor
authors.forename: Z
authors.initials: Z
authors.lastname: Ramtoola
mesh_terms: D001672:Biocompatible Materials; D001673:Biodegradation, Environmental; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D019344:Lactic Acid; D008970:Molecular Weight; D010316:Particle Size; D011091:Polyesters; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C033616:poly(lactide)