| 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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Frey, Holger
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024Supersoft Polymer Melts in Binary Blends of Bottlebrush cis‐1,4‐Polyfarnesene and cis‐1,4‐Polyisoprenecitations
- 2023Merging styrene and diene structures to a cyclic diene : anionic polymerization of 1-vinylcyclohexene (VCH)
- 2023Merging Styrene and Diene Structures to a Cyclic Diene: Anionic Polymerization of 1‐Vinylcyclohexene (VCH)citations
- 2023Bifunctional Carbanionic Synthesis of Fully Bio-Based Triblock Structures Derived from β-Farnesene and ll-Dilactide: Thermoplastic Elastomerscitations
- 2023Bifunctional Carbanionic Synthesis of Fully Bio-Based Triblock Structures Derived from β-Farnesene and ll-Dilactide: Thermoplastic Elastomers
- 2023Revealing the monomer gradient of polyether copolymers prepared using N‐heterocyclic olefins : metal‐free anionic versus zwitterionic Lewis pair polymerization
- 2023Bifunctional carbanionic synthesis of fully bio-based triblock structures derived from β-farnesene and LL-dilactide : thermoplastic elastomers
- 2022Glycidyl cinnamate : copolymerization with glycidyl ethers, in-situ NMR kinetics, and photocrosslinking
- 2022In situ kinetics reveal the influence of solvents and monomer structure on the anionic ring-opening copolymerization of epoxides
- 2020Efficiency Boosting of Surfactants with Poly(ethylene oxide)-Poly(alkyl glycidyl ether)s: A New Class of Amphiphilic Polymerscitations
- 2020Tapered copolymers of styrene and 4-vinylbenzocyclobutene via carbanionic polymerization for crosslinkable polymer films
- 2020Synthesis and Solution Processing of Nylon-5 Ferroelectric Thin Filmscitations
- 2020Synthesis and solution processing of nylon-5 ferroelectric thin films : the renaissance of odd-nylons?
- 2019Glycidyl tosylate: polymerization of a “non-polymerizable” monomer permits universal post-functionalization of polyethers
- 2019Solution-processed transparent ferroelectric nylon thin filmscitations
- 2017Acid-labile surfactants based on poly(ethyleneglycol), carbon dioxide and propylene oxidecitations
- 2016Oxidation-responsive and "clickable" poly(ethylene glycol) via copolymerization of 2-(methylthio)ethyl glycidyl ethercitations
- 2016Acid-Labile Amphiphilic PEO-b-PPO-b-PEO Copolymerscitations
- 2016Hierachical Ni@Fe2O3 superparticles through epitaxial growth of gamma-Fe2O3 nanorods on in situ formed Ni nanoplatescitations
- 2016Processing and adjusting the hydrophilicity of poly(oxymethylene) (co)polymerscitations
- 2014Stimuli-Responsive Tertiary Amine Functional PEGs Based on N,N-Dialkylglycidylaminescitations
- 2014Ferrocene-containing multifunctional polyetherscitations
- 2013Enlarging the toolboxcitations
- 2013Ferrocenyl glycidyl ethercitations
- 2011Rapid access to polyfunctional lipids with complex architecture via oxyanionic ring-opening polymerizationcitations
- 2011PEG-based multifunctional polyethers with highly reactive vinyl-ether side chains for click-type functionalizationcitations
- 2010"Functional poly(ethylene glycol)"citations
- 2008Carbanions on tap - Living anionic polymerization in a microstructured reactorcitations
- 2008Ionic polymerizations in microstructured reactors
Places of action
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article
Stimuli-Responsive Tertiary Amine Functional PEGs Based on N,N-Dialkylglycidylamines
Abstract
<p>Amine-functional poly(ethylene glycol) (PEG) copolymers have been prepared that exhibit thermo- and pH- responsive behavior in aqueous solution. Three novel tertiary di(n-alkyl)glycidylamine monomers have been introduced for anionic ring-opening copolymerization (AROcP) with ethylene oxide (EO): N,N-di(n-butyl)glycidylamine (DButGA), N,N-di(n-hexyl)glycidylamine (DHexGA), and N,N-di(n-octyl)glycidylamine (DOctGA). Via controlled AROcP we synthesized well-defined (M<sub>w</sub>/M<sub>n</sub> = 1.05-1.14), water-soluble block- and gradient-type PEG copolymers, containing up to 25 mol % of the respective dialkylglycidylamine comonomer. Molecular weights ranged from 4900 to 12-000 g mol<sup>-1</sup>. Detailed in-situ<sup>1</sup>H NMR kinetics and<sup>13</sup>C triad analyses elucidate the microstructures of the copolymers and the relative reactivity of the novel comonomers. Notably, the n-alkyl chain length had no significant influence on the relative reactivity of the glycidylamine comonomers. Calculated reactivity ratios ranged from r<sub>EO</sub> = 1.84, r<sub>DButGA</sub> = 0.49 to r<sub>EO</sub> = 1.78, r<sub>DOctGA</sub> = 0.42, manifesting the formation of gradient copolymers. Thermo- and pH-responsive properties of these copolymers are precisely tunable by the comonomer ratio, and cloud points in aqueous solution can be adjusted between 21 and 93 °C. Electron paramagnetic resonance (EPR) spectroscopic studies with TEMPO as a spin probe were conducted to elucidate host-guest interactions of the copolymers. Unexpectedly, the n-alkyl chain length of the different glycidylamine comonomers only influences the inverse phase transition of the gradient copolymers, but not of the block copolymers on the nanoscale. Self-assembly of the block- and gradient-type copolymers in aqueous alkaline solution by both static and dynamic light scattering has also been investigated after confirming the existence of pure unimers in methanol.</p>