| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Aguiar-Ricardo, Ana
Universidade Nova de Lisboa
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2020Cyclodextrin solubilization and complexation of antiretroviral drug lopinavir: In silico prediction; Effects of derivatization, molar ratio and preparation methodcitations
- 2018Preparation of ibuprofen/hydroxypropyl-Γ-cyclodextrin inclusion complexes using supercritical CO2-assisted spray dryingcitations
- 2017Supercritical CO2-assisted spray drying of strawberry-like gold-coated magnetite nanocomposites in chitosan powders for inhalationcitations
- 2017Bioactivity, mechanical properties and drug delivery ability of bioactive glass-ceramic scaffolds coated with a natural-derived polymercitations
- 2016Design of experiments approach on the preparation of dry inhaler chitosan composite formulations by supercritical CO2-assisted spray-dryingcitations
- 2015Design of oligoaziridine-PEG coatings for efficient nanogold cellular biotaggingcitations
- 2015POxylated Polyurea Dendrimerscitations
- 2014Polyurea dendrimer for efficient cytosolic siRNA deliverycitations
- 2014Development of dual-responsive chitosan-collagen scaffolds for pulsatile release of bioactive moleculescitations
- 2012Dual stimuli responsive poly(N-isopropylacrylamide) coated chitosan scaffolds for controlled release prepared from a non residue technologycitations
- 2012Biocompatible polyurea dendrimers with pH-dependent fluorescencecitations
- 2008Preparation of membranes with polysulfone/polycaprolactone blends using a high pressure cell specially designed for a CO2-assisted phase inversioncitations
- 2008Ultrasonic energy as a tool in the sample treatment for polymer characterization through matrix-assisted laser desorption ionization time-of-flight mass spectrometrycitations
- 2007Boron trifluoride catalyzed polymerisation of 2-substituted-2-oxazolines in supercritical carbon dioxidecitations
- 2006Visual and acoustic investigation of the critical behavior of mixtures of CO2 with a perfluorinated polyethercitations
Places of action
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article
Boron trifluoride catalyzed polymerisation of 2-substituted-2-oxazolines in supercritical carbon dioxide
Abstract
In the last few years there has been an intensive research on multifunctional polymers for therapeutical applications. Poly(2-substituted-2-oxazolines) are strong candidates for the development of new polymeric therapeutics. In this work, boron trifluoride etherate was used, for the first time, as initiator for the polymerisation of three substituted 2-oxazolines in supercritical carbon dioxide. The effect of temperature, pressure and initial monomer/ initiator molar ratio on the yield, average molecular weight and polydispersity of the synthesized polymers was investigated. The products of the reaction were characterized by NMR, FT-IR and MALDI-TOF mass spectrometry. In all reactions, low molecular weight polymers were obtained in high yield with narrow molecular weight distribution. 2-Methyl-and 2-ethyl-2-oxazolines yielded water soluble products with degrees of polymerisation varying from 18 to 27 and 17 to 24, respectively, while poly(2-phenyl-2-oxazoline) was found to be insoluble in water and the degree of polymerisation varying from 10 to 12. In each polymerisation, there was an unexpected CO2 insertion in 10-25% of the overall polymer. A possible explanation for this insertion is given.