Post-Polymerization Modification

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Chemistry".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 7229

Special Issue Editors


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Guest Editor
Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
Interests: post-polymerization modification; RAFT; ATRP; smart polymers; thin films; batteries

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Guest Editor
Department of Chemistry and Center for Drug Discovery, Design and Delivery in Dedman College, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, USA
Interests: polymer chemistry; materials science; catalysis; reaction mechanisms; hypervalent compounds; science education
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Special Issue Information

Dear Colleagues,

Due to the immense importance of polymers containing functional groups, including those that are reactive, coordinating, fluorescent, or target ligands on cell membranes, etc., many methodologies have been developed for the preparation of these materials. As an alternative to the direct polymerization of monomers that already contain desired functionality, various functionalization reactions of pre-made polymers (both synthetic and natural) have attracted significant attention because they not only allow access to materials for advanced applications but also enable the establishment of structure-property relationships. In summary, this Special Issue will be a collection of review and original research papers that concentrate on recent advances in efficient post-polymerization modification reactions as well as materials applications.

Prof. Patrick Theato
Prof. Nicolay V. Tsarevsky
Guest Editors

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Published Papers (2 papers)

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Research

16 pages, 2770 KiB  
Article
Adamantane Functionalized Poly(2-oxazoline)s with Broadly Tunable LCST-Behavior by Molecular Recognition
by Joachim F. R. Van Guyse, Debaditya Bera and Richard Hoogenboom
Polymers 2021, 13(3), 374; https://0-doi-org.brum.beds.ac.uk/10.3390/polym13030374 - 26 Jan 2021
Cited by 10 | Viewed by 2255
Abstract
Smart or adaptive materials often utilize stimuli-responsive polymers, which undergo a phase transition in response to a given stimulus. So far, various stimuli have been used to enable the modulation of drug release profiles, cell-interactive behavior, and optical and mechanical properties. In this [...] Read more.
Smart or adaptive materials often utilize stimuli-responsive polymers, which undergo a phase transition in response to a given stimulus. So far, various stimuli have been used to enable the modulation of drug release profiles, cell-interactive behavior, and optical and mechanical properties. In this respect, molecular recognition is a powerful tool to fine-tune the stimuli-responsive behavior due to its high specificity. Within this contribution, a poly(2-oxazoline) copolymer bearing adamantane side chains was synthesized via triazabicyclodecene-catalyzed amidation of the ester side chains of a poly(2-ethyl-2-oxazoline-stat-2-methoxycarbonylpropyl-2-oxazoline) statistical copolymer. Subsequent complexation of the pendant adamantane groups with sub-stoichiometric amounts (0–1 equivalents) of hydroxypropyl β-cyclodextrin or β-cyclodextrin enabled accurate tuning of its lower critical solution temperature (LCST) over an exceptionally wide temperature range, spanning from 30 °C to 56 °C. Furthermore, the sharp thermal transitions display minimal hysteresis, suggesting a reversible phase transition of the complexed polymer chains (i.e., the β-cyclodextrin host collapses together with the polymers) and a minimal influence by the temperature on the supramolecular association. Analysis of the association constant of the polymer with hydroxypropyl β-cyclodextrin via 1H NMR spectroscopy suggests that the selection of the macrocyclic host and rational polymer design can have a profound influence on the observed thermal transitions. Full article
(This article belongs to the Special Issue Post-Polymerization Modification)
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14 pages, 3021 KiB  
Article
Hydrophobilization of Furan-Containing Polyurethanes via Diels–Alder Reaction with Fatty Maleimides
by Philipp Schmidt and Steven Eschig
Polymers 2019, 11(8), 1274; https://0-doi-org.brum.beds.ac.uk/10.3390/polym11081274 - 31 Jul 2019
Cited by 2 | Viewed by 4500
Abstract
We describe new hydrophobic functionalized linear polyurethane resins by combining N-alkyl maleimides via the Diels–Alder reaction with linear furan-modified polyurethanes. This procedure provides the opportunity for the post-polymerization-functionalizing of polyurethanes. Access to furan-bearing polyurethanes is achieved via the reaction of a furan-containing diol, [...] Read more.
We describe new hydrophobic functionalized linear polyurethane resins by combining N-alkyl maleimides via the Diels–Alder reaction with linear furan-modified polyurethanes. This procedure provides the opportunity for the post-polymerization-functionalizing of polyurethanes. Access to furan-bearing polyurethanes is achieved via the reaction of a furan-containing diol, polyethylenglycol (PEG), and different diisocyanates. The furan-containing diol is obtained from the reaction of furfurylamine and two equivalents of hydroxyalkyl acrylate. The resulting furan-bearing polyurethanes are reacted with fatty amine-based N-alkyl maleimides. The maleimide and furan functionalities undergo a Diels–Alder reaction, which allows for the covalent bonding of the hydrophobic side chains to the polyurethane backbone. The covalent bonding of the hydrophobic maleimides to the polyurethane backbone is proven by means of NMR. The influence of the functionalization on the surface properties of the resulting polyurethane films is analyzed via the determination of surface energy via the sessile drop method. Full article
(This article belongs to the Special Issue Post-Polymerization Modification)
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