Synthesis of a Hyperbranched Polymer with Perfect Branching Based on Piperidine-4-one

Synthesis of a Hyperbranched Polymer with Perfect Branching Based on Piperidine-4-one

A new class of a hyperbranched polymer with 100% degree of branching has been successfully prepared by using 1-(3-phenoxypropyl)piperidine-4-one as an AB2 monomer in the presence of methanesulfonic acid. This hyperbranched polymer is based upon a piperidine-4-one ring and is designed to react with a...

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Veröffentlicht in:Macromolecules 2009-02, Vol.42 (4), p.994-1001
Hauptverfasser: Sinananwanich, Warapon, Higashihara, Tomoya, Ueda, Mitsuru
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
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container_title Macromolecules
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creator Sinananwanich, Warapon
Higashihara, Tomoya
Ueda, Mitsuru
description A new class of a hyperbranched polymer with 100% degree of branching has been successfully prepared by using 1-(3-phenoxypropyl)piperidine-4-one as an AB2 monomer in the presence of methanesulfonic acid. This hyperbranched polymer is based upon a piperidine-4-one ring and is designed to react with aromatic nucleophiles to give an irreversibly formed diarylated compound. The electrophilicity of piperidine-4-one is enhanced by through-space electrostatic repulsion and an inductive effect. The kinetics of the model reaction between 1-ethylpiperidine-4-one and anisole was examined. The reaction followed second-order kinetics, indicating that the first reaction, that is, the formation of the intermediate from the reaction between 1-ethylpiperidine-4-one and anisole, is considerably slower than the second one, that is, the reaction of the generated intermediate with anisole. On the basis of this observation, a new monomer, which was expected to produce a 100% branched hyperbranched polymer, was designed and synthesized. The obtained polymer was characterized by 1H and 13C NMR spectroscopy, which affirmed the 100% degree of branching of the hyperbranched polymer.
doi_str_mv 10.1021/ma802516a
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
title Synthesis of a Hyperbranched Polymer with Perfect Branching Based on Piperidine-4-one
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