Copolymer chain formation of 2-oxazolines by in situ1H-NMR spectroscopy: dependence of sequential composition on substituent structure and monomer ratios

0541040 - ÚMCH 2022 RIV GB eng J - Journal Article
Abbrent, Sabina - Mahun, Andrii - Dušková-Smrčková, Miroslava - Kobera, Libor - Konefal, Rafal - Černoch, Peter - Dušek, Karel - Brus, Jiří
Copolymer chain formation of 2-oxazolines by in situ1H-NMR spectroscopy: dependence of sequential composition on substituent structure and monomer ratios.
RSC Advances. Roč. 11, č. 18 (2021), s. 10468-10478. E-ISSN 2046-2069
R&D Projects: GA ČR(CZ) GA18-12925S
Grant - others:AV ČR(CZ) StrategieAV21/10
Program: StrategieAV
Institutional support: RVO:61389013
Keywords : poly-2-oxazolines * polymer microstructure * in-situ CROP co-polymerization
OECD category: Polymer science
Impact factor: 4.036, year: 2021
Method of publishing: Open access
https://pubs.rsc.org/en/content/articlelanding/2021/RA/D1RA01509E#!divAbstract

In situ 1H NMR characterization of copolymerization reactions of various 2-oxazoline monomers at different molar ratios offers detailed insight into the build-up and composition of the polymer chains. Various 2-oxazolines were copolymerized in one single solvent, butyronitrile, with 2-dec-9′-enyl-2-oxazoline, where the double bond allows for post-polymerization modification and can function as a crosslinking unit to form polymer networks. The types of the monomers and their molar ratios in the feed have a strong effect on the microstructure of the forming copolymer chains. Copolymers comprising 2-dec-9′-enyl-2-oxazoline and either 2-ethyl-, 2-isopropyl-, 2-butyl-, 2-heptyl, 2-nonyl- or 2-phenyl-2-oxazoline, show significant differences in sequential structure of copolymers ranging from block to gradient and random ordering of the monomer units. 1H NMR was found to be a powerful tool to uncover detailed oxazoline copolymerization kinetics and evolution of chain composition.
Permanent Link: http://hdl.handle.net/11104/0319045