Self-assembly of double hydrophilic poly(2-ethyl-2-oxazoline)-b-poly(N-vinylpyrrolidone) block copolymers in aqueous solution

Willersinn, J. and Schmidt, B. V.K.J. (2017) Self-assembly of double hydrophilic poly(2-ethyl-2-oxazoline)-b-poly(N-vinylpyrrolidone) block copolymers in aqueous solution. Polymers, 9(7), 293. (doi:10.3390/polym9070293) (PMID:30970968) (PMCID:PMC6431970)

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Abstract

The self-assembly of a novel combination of hydrophilic blocks in water is presented, namely poly(2-ethyl-2-oxazoline)-b-poly(N-vinylpyrrolidone) (PEtOx-b-PVP). The completely water-soluble double hydrophilic block copolymer (DHBC) is formed via copper-catalyzed polymer conjugation, whereas the molecular weight of the PVP is varied in order to study the effect of block ratio on the self-assembly process. Studies via dynamic light scattering, static light scattering as well as microscopy techniques, e.g., cryo scanning electron microscopy or laser scanning confocal microscopy, show the formation of spherical particles in an aqueous solution with sizes between 300 and 400 nm. Particles of the DHBCs are formed without the influence of external stimuli. Moreover, the efficiency of self-assembly formation relies significantly on the molar ratio of the utilized blocks. The nature of the formed structures relies further on the concentration, and indications of particular and vesicular structures are found.

Item Type:Articles
Additional Information:The authors gratefully acknowledge the Max-Planck Society for funding of the research work and open access publishing.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Schmidt, Dr Bernhard
Authors: Willersinn, J., and Schmidt, B. V.K.J.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Polymers
Publisher:MDPI
ISSN:2073-4360
ISSN (Online):2073-4360
Published Online:20 July 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Polymers 9(7): 293
Publisher Policy:Reproduced under a Creative Commons License

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