Hydrogels in pharmaceutical formulations.

23 Stereocontrol of Lactide ROP 6164 231 Isotactic Polylactides 6164 232 Syndiotactic Polylactides 6166 233 Heterotactic Polylactides 6166 3 Anionic Polymerization 6166 4 Nucleophilic Polymerization 6168 41 Mechanistic Considerations 6168 42 Catalysts 6169 421 Enzymes 6169 422 Organocatalysts 6169 43 Stereocontrol of Lactide ROP 6170 44 Depolymerization 6170 5 Cationic Polymerization 6170 6 Conclusion and Perspectives 6171 7 Acknowledgments 6173 8 References and Notes 6173

Controlled ring-opening polymerization of lactide and glycolide.

1: Magnetic Particles: Preparation, Properties and Applications: M. Ozaki. 2: Maghemite (gamma-Fe2O3): A Versatile Magnetic Colloidal Material C.J. Serna, M.P. Morales. 3: Dynamics of Adsorption and Oxidation of Organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water M.A. Blesa, R.J. Candal, S.A. Bilmes. 4: Colloidal Aggregation in Two-Dimensions A. Moncho-Jorda, F. Martinez-Lopez, M.A. Cabrerizo-Vilchez, R. Hidalgo Alvarez, M. Quesada-PMerez. 5: Kinetics of Particle and Protein Adsorption Z. Adamczyk.

Surface and Colloid Science

http://wwwcourses.sens.buffalo.edu/ce435/Riess03.pdf

Micellization of block copolymers

Hydrogel Nanoparticles in Drug Delivery

Biodegradable chitosan nanogels crosslinked with genipin.

Synthesis and characterization of poly(methacrylic acid) hydrogels for metoclopramide delivery

Poly(4-vinylpyridine) and poly(2-vinylpyridine) were found to be miscible with poly(2-hydroxyethylmethacrylate) and poly(3-hydroxypropylmethacrylate). This miscibility is proved by calorimetric studies in conjunction with IR analysis of the blends. All blends show a single T g which is of a higher value than the T g s of the blends calculated on the basis of additive behavior. Furthermore, the variation of the T g of the blends follows the Jenckel-Heusch equation. IR studies show that carbonyl, hydroxyl, and pyridine ring peaks undergo important changes which were attributed to hydrogen bonding between the hydroxyl groups in both methacrylates and the basic nitrogen atom present within the pyridine ring

Miscibility and specific interactions in blends of poly(hydroxy methacrylates) with poly(vinylpyridines)

The specific interactions between poly(vinylpyridine) and copolymers of vinyl alcohol/vinyl acetate of different compositions have been studied by FTIR. Hydrogen bonding between both polymer components leads to significant spectral modification in hydroxyl, carbonyl, and pyridine rings spectral bands. Minor modifications in other spectral modes have also been detected. The spectral results indicate at least three competing equilibrium processes in the blends: copolymer self-association (hydroxyl-hydroxyl and hydroxyl-carbonyl) and hydroxyl-pyridine interassociation. The Punter-Coleman association model for three interacting units was successfully applied

Hydrogen bonding in poly(4-vinylpyridine)/poly(vinyl acetate-co-vinyl alcohol) blends. An infrared study

The equilibrium swelling and the plateau elastic modulus of a family of hydrogels made by the polymerization of acrylamide with itaconic acid or some of its esters were investigated as a function of composition and crosslinking degree to find materials with satisfactory swelling and elastic properties. We show that an appropriate selection of the comonomers and the concentration of the crosslinking agent is very important to produce hydrogels with large swelling capacity and good mechanical attributes. Tailoring of mechanical properties and swelling can also be achieved by this method.

Issa Katime

Papers

Biodegradable chitosan nanogels crosslinked with genipin.

Synthesis and characterization of poly(methacrylic acid) hydrogels for metoclopramide delivery

Miscibility and specific interactions in blends of poly(hydroxy methacrylates) with poly(vinylpyridines)

Hydrogen bonding in poly(4-vinylpyridine)/poly(vinyl acetate-co-vinyl alcohol) blends. An infrared study

Equilibrium swelling and mechanical properties of hydrogels of acrylamide and itaconic acid or its esters