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Open AccessArticle

Synthesis and Investigation of Thermo-Induced Gelation of Partially Cross-Linked Poly-2-isopropyl-2-oxazoline in Aqueous Media

1
Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr., 31, Saint Petersburg 199004, Russia
2
Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(3), 698; https://doi.org/10.3390/polym12030698
Received: 26 February 2020 / Revised: 17 March 2020 / Accepted: 18 March 2020 / Published: 21 March 2020
(This article belongs to the Special Issue Polymer Rheology: Fundamentals and Applications)
Water-soluble, partially cross-linked poly-2-isopropyl-2-oxazoline combining the properties of chemical and physical gels was synthesized by a two-step procedure. Thermally induced sol-gel transition in its aqueous solution was studied by rheology, light scattering, and turbidimetry. It was demonstrated that the synthesized product is bimodal; it consists of linear and cross-linked components. The cross-linked components are responsible for the gelation, while the linear ones abate the viscosity growth. Heating the solution above the phase transition temperature leads to the self-assembly of the particles into a physical gel. The combination of chemical and physical cross-linking was found to be a prospective route for thermosensitive gel development. View Full-Text
Keywords: polyoxazolines; cross-linking polymers; thermo-induced gelation; steady-state flow rheology; turbidimetry polyoxazolines; cross-linking polymers; thermo-induced gelation; steady-state flow rheology; turbidimetry
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MDPI and ACS Style

Amirova, A.; Rodchenko, S.; Kurlykin, M.; Tenkovtsev, A.; Krasnou, I.; Krumme, A.; Filippov, A. Synthesis and Investigation of Thermo-Induced Gelation of Partially Cross-Linked Poly-2-isopropyl-2-oxazoline in Aqueous Media. Polymers 2020, 12, 698.

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