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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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Shaver, Michael P.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Performance polyamides built on a sustainable carbohydrate corecitations
- 2024Mechanical Properties and Recyclability of Fibre Reinforced Polyester Compositescitations
- 2023Degradable and Reprocessable Resins from a Dioxolanone Cross-Linkercitations
- 2023Understanding poly(ethylene terephthalate) degradation using gas-mediated simulated recyclingcitations
- 2020Mechanical Recycling of Packaging Plastics: A Reviewcitations
- 2018Polymeric hole-transport materials with side-chain redox-active groups for perovskite solar cells with good reproducibilitycitations
- 2018Polymeric hole-transport materials with side-chain redox-active groups for perovskite solar cells with good reproducibilitycitations
- 2018Thermal, optical and structural properties of blocks and blends of PLA and P2HEBcitations
- 2018Functionalizable Stereocontrolled Cyclopolyethers by Ring-Closing Metathesis as Natural Polymer Mimicscitations
- 2018Morphology of Poly(styrene-co-butadiene) Random Copolymer Thin Films and Nanostructures on a Graphite Surfacecitations
- 2017Thermal, structural and degradation properties of an aromatic-aliphatic polyester built through ring-opening polymerisationcitations
- 2017Poly(styrene-co-butadiene) Random Copolymer Thin Films and Nanostructures on a Mica Surface: Morphology and Contact Angles of Nanodropletscitations
- 2017Olefin cross metathesis and ring-closing metathesis in polymer chemistrycitations
- 2016Installing Multiple Functional Groups on Biodegradable Polyesters via Post-Polymerization Olefin Cross-Metathesiscitations
- 2015Aluminum Salen and Salan Polymerization Catalystscitations
- 2014Tuning ligand electronics and peripheral substitution on cobalt salen complexes:Structure and polymerisation activitycitations
- 2014Tuning ligand electronics and peripheral substitution on cobalt salen complexescitations
- 2013Aluminium salophen and salen initiators in the ring-opening polymerisation of rac-lactide and rac-β-butyrolactone::Electronic effects on stereoselectivity and polymerisation ratescitations
- 2013Poly(lactic acid) polymer stars built from early generation dendritic polyolscitations
- 2013Tacticity-induced changes in the micellization and degradation properties of poly(lactic acid)-block-poly(ethylene glycol) copolymerscitations
- 2013Aluminium salophen and salen initiators in the ring-opening polymerisation of rac-lactide and rac-β-butyrolactone:citations
- 2012Control of thermal properties and hydrolytic degradation in poly(lactic acid) polymer stars through control of isospecificity of polymer armscitations
- 2012Anilido-aldimine aluminum complexes:citations
- 2012Controlled radical polymerization mediated by Amine-Bis(phenolate) Iron(III) complexescitations
- 2012Anilido-aldimine aluminum complexes::Synthesis, characterization and lactide polymerizationcitations
- 2010Tacticity control in the synthesis of poly(lactic acid) polymer stars with dipentaerythritol corescitations
- 20084.4,5,5-tetraphenyl-1,3,2-dioxaborolanecitations
- 2000Trans alkenylpyridine and alkenylamine complexes of platinum
Places of action
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article
Tacticity-induced changes in the micellization and degradation properties of poly(lactic acid)-block-poly(ethylene glycol) copolymers
Abstract
Poly(lactic acid)-block-poly(ethylene glycol) copolymers (PLA-b-PEG) featuring varying tacticities (atactic, heterotactic, isotactic) in the PLA block were synthesized and investigated for their micellar stability, degradation, and thermal properties. Utilizing tin(II) bis(2-ethylhexanoate), aluminum salan, and aluminum salen catalysts, the copolymers were synthesized through the ring-opening polymerization of d-, l-, rac-, or a blend of l- and rac-lactide using monomethoxy-poly(ethylene glycol) as a macroinitiator. The critical micelle concentration, which reflects the micellar stability, was probed using a fluorescence spectroscopic method with pyrene as the probe. The copolymers were degraded in a methanolic solution of 1,5,7-triaza-bicyclo[4.4.0]dec-5-ene and the degradation was measured by H-1 NMR spectroscopic and gel permeation chromatographic analyses. Differential scanning calorimetry and thermogravimetric analysis provided information on the thermal properties of the copolymers. Atactic and heterotactic microstructures in the PLA block resulted in lower micellar stability, as well as faster degradation and shorter erosion time compared to polymers with high isotactic enchainment (P-m). By modification of the P-m, micellar stability, degradation, and erosion rates of the copolymers can be tuned to specific biomedical applications. Interestingly, while tin(II) bis(2-ethylhexanoate) and aluminum salan-catalyzed PLA-b-PEG copolymers exhibited similar micellization behavior, the aluminum salen-catalyzed PLA-b-PEG exhibited unique behavior at high micelle concentration in the presence of the pyrene probe. This unique behavior can be attributed to the disintegration of the micelles through the interactions of long isotactic stereoblock segments.