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Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether

Linear polyglycerol is known as a highly hydrophilic and biocompatible polymer that is currently considered for numerous medical applications. Derived from this well-known structure, the synthesis of highly biocompatible, thermoresponsive polyether copolymers via statistical anionic ring-opening cop...

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Autores principales: Müller, Verena, Matthes, Rebecca, Wagner, Manfred, Bros, Matthias, Dreier, Philip, Frey, Holger
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10228176/
https://www.ncbi.nlm.nih.gov/pubmed/37261292
http://dx.doi.org/10.1039/d3py00064h
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author Müller, Verena
Matthes, Rebecca
Wagner, Manfred
Bros, Matthias
Dreier, Philip
Frey, Holger
author_facet Müller, Verena
Matthes, Rebecca
Wagner, Manfred
Bros, Matthias
Dreier, Philip
Frey, Holger
author_sort Müller, Verena
collection PubMed
description Linear polyglycerol is known as a highly hydrophilic and biocompatible polymer that is currently considered for numerous medical applications. Derived from this well-known structure, the synthesis of highly biocompatible, thermoresponsive polyether copolymers via statistical anionic ring-opening copolymerization of ethyl glycidyl ether (EGE) and ethoxy ethyl glycidyl ether (EEGE) is described. Subsequent deprotection of the acetal groups of EEGE yields copolymers of linear glycerol (linG) and EGE, P(linG-co-EGE). These copolymers showed monomodal and narrow molecular weight distributions with dispersities Đ ≤ 1.07. The microstructure was investigated via in situ(1)H NMR kinetics experiments, revealing reactivity ratios of r(EEGE) = 1.787 ± 0.007 and r(EGE) = 0.560 ± 0.002, showing a slightly favored incorporation of EEGE over EGE. Due to the deliberate incorporation of rather hydrophobic EGE units into the water soluble linPG, tunable thermoresponsive behavior is achieved with cloud point temperatures T(cp) between 9.0–71.4 °C. Besides the commonly utilized method turbidimetry, temperature-dependent (1)H NMR measurements were used for more accurate and reproducible results. The change of the hydrodynamic radii r(H) of the copolymers and their aggregates upon reaching T(cp) was investigated via DOSY NMR spectroscopy. To explore possible biomedical applications, as an example, the cell viability and immunology of an exemplary P(linG-co-EGE) copolymer sample was investigated. Since both, cell viability and immunology are comparable to the gold standard PEG, the herein presented copolymers show high potential as biocompatible and thermoresponsive alternatives to PEG for biomedical applications.
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spelling pubmed-102281762023-05-31 Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether Müller, Verena Matthes, Rebecca Wagner, Manfred Bros, Matthias Dreier, Philip Frey, Holger Polym Chem Chemistry Linear polyglycerol is known as a highly hydrophilic and biocompatible polymer that is currently considered for numerous medical applications. Derived from this well-known structure, the synthesis of highly biocompatible, thermoresponsive polyether copolymers via statistical anionic ring-opening copolymerization of ethyl glycidyl ether (EGE) and ethoxy ethyl glycidyl ether (EEGE) is described. Subsequent deprotection of the acetal groups of EEGE yields copolymers of linear glycerol (linG) and EGE, P(linG-co-EGE). These copolymers showed monomodal and narrow molecular weight distributions with dispersities Đ ≤ 1.07. The microstructure was investigated via in situ(1)H NMR kinetics experiments, revealing reactivity ratios of r(EEGE) = 1.787 ± 0.007 and r(EGE) = 0.560 ± 0.002, showing a slightly favored incorporation of EEGE over EGE. Due to the deliberate incorporation of rather hydrophobic EGE units into the water soluble linPG, tunable thermoresponsive behavior is achieved with cloud point temperatures T(cp) between 9.0–71.4 °C. Besides the commonly utilized method turbidimetry, temperature-dependent (1)H NMR measurements were used for more accurate and reproducible results. The change of the hydrodynamic radii r(H) of the copolymers and their aggregates upon reaching T(cp) was investigated via DOSY NMR spectroscopy. To explore possible biomedical applications, as an example, the cell viability and immunology of an exemplary P(linG-co-EGE) copolymer sample was investigated. Since both, cell viability and immunology are comparable to the gold standard PEG, the herein presented copolymers show high potential as biocompatible and thermoresponsive alternatives to PEG for biomedical applications. The Royal Society of Chemistry 2023-04-14 /pmc/articles/PMC10228176/ /pubmed/37261292 http://dx.doi.org/10.1039/d3py00064h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Müller, Verena
Matthes, Rebecca
Wagner, Manfred
Bros, Matthias
Dreier, Philip
Frey, Holger
Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
title Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
title_full Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
title_fullStr Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
title_full_unstemmed Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
title_short Tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
title_sort tailoring thermoresponsiveness of biocompatible polyethers: copolymers of linear glycerol and ethyl glycidyl ether
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10228176/
https://www.ncbi.nlm.nih.gov/pubmed/37261292
http://dx.doi.org/10.1039/d3py00064h
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