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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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Cabrita, Eurico J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2021Effect of water on the structure and dynamics of choline chloride/glycerol eutectic systemscitations
- 2017A comparison between pure active pharmaceutical ingredients and therapeutic deep eutectic solventscitations
- 2014Ion jelly conductive properties using dicyanamide-based ionic liquidscitations
- 2012Understanding the Ion Jelly Conductivity Mechanismcitations
- 2009Influence of feeding strategies of mixed microbial cultures on the chemical composition and microstructure of copolyesters P(3HB-co-3HV) analyzed by NMR and statistical analysis
- 2007Boron trifluoride catalyzed polymerisation of 2-substituted-2-oxazolines in supercritical carbon dioxidecitations
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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.