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One-Pot Synthesis of Hyperbranched Polyurethane-Triazoles with Controlled Structural, Molecular Weight and Hydrodynamic Characteristics
Russian Acad Sci, Dept Polymers & Composite Mat, Fed Res Ctr Problems Chem Phys & Med Chem, Chernogolovka 142432, Russia..ORCID iD: 0000-0002-9569-3633
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0002-1535-9476
Russian Acad Sci, Dept Polymers & Composite Mat, Fed Res Ctr Problems Chem Phys & Med Chem, Chernogolovka 142432, Russia..
Russian Acad Sci, Dept Polymers & Composite Mat, Fed Res Ctr Problems Chem Phys & Med Chem, Chernogolovka 142432, Russia..
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2022 (English)In: Polymers, E-ISSN 2073-4360, Vol. 14, no 21, article id 4514Article in journal (Refereed) Published
Abstract [en]

We report a simple and convenient approach to the one-pot synthesis of hyperbranched polyurethane-triazoles with desirable properties. This method is based on in situ generation of an AB(2) + A(2) + B-4 azide-acetylene monomer mixture of known composition, due to quantitative reactions of urethane formation between isophorone diisocyanate (IPDI), 1,3-diazidopropanol-2 (DAPOL) (in the first stage) and propargyl alcohol (in the second stage). The obtained monomer mixture can be involved in step-growth polymerization by azide-alkyne cycloaddition without additional purification (in the third stage). The properties of the resulting polymers should depend on the composition of the monomer mixture. Therefore, first the model revealing the correlation between the monomer composition and the ratio and reactivity of the IPDI and DAPOL active groups is developed and proven. In addition, the newly developed structural kinetic model considering the substitution effect at polyaddition of the complex mixture of monomers allows the prediction of the degree of branching of the target polymer. Based on our calculations, the hyperbranched polyurethane-triazoles were synthesized under found conditions. All products were characterized by H-1 NMR, FTIR, SEC, DLS, DSC, TGA and viscometry methods. It was shown that the degree of branching, molecular weight, intrinsic viscosity, and hydrodynamic radius of the final hyperbranched polymers can be specified at the first stage of one-pot synthesis. The obtained hyperbranched polyurethane-triazoles showed a degree of branching from 0.21 to 0.44 (calculated DB-0.25 and 0.45, respectively).

Place, publisher, year, edition, pages
MDPI AG , 2022. Vol. 14, no 21, article id 4514
Keywords [en]
hyperbranched polymers, polyurethane-triazoles, degree of branching, polyaddition
National Category
Polymer Technologies Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-322002DOI: 10.3390/polym14214514ISI: 000881654900001PubMedID: 36365508Scopus ID: 2-s2.0-85141828477OAI: oai:DiVA.org:kth-322002DiVA, id: diva2:1714610
Note

QC 20221130

Available from: 2022-11-30 Created: 2022-11-30 Last updated: 2024-01-17Bibliographically approved

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Iakunkov, Artem

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