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Nitroxide radical-containing polynorbornenes by ring-opening metathesis polymerization as stabilizing agents for polyolefins

Abstract : A series of original 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-containing dicarboximide norbornene monomers have been synthesized and polymerized via ring-opening metathesis polymerization (ROMP) using the Grubbs 3 rd generation catalyst. First-order kinetics and linear evolutions of the molar mass with monomer conversion were obtained together with decreasing dispersity (Đ) down to 1.05-1.15. The rate of polymerization decreased with increasing alkyl chain length and an amide anchor group bound to the TEMPO functionality. Well-controlled TEMPO-containing polynorbornenes were prepared with a monomer to initiator ratio up to 1000, resulting in polymers with a high density in radical sites uniformly distributed along the backbone. These TEMPO-containing polynorbornenes have shown to be efficient as stabilizing agents in polypropylene, through onset oxidation temperature (OOT) measurements.
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https://hal-univ-lemans.archives-ouvertes.fr/hal-02318934
Contributeur : Laurent Fontaine <>
Soumis le : jeudi 17 octobre 2019 - 15:51:36
Dernière modification le : mercredi 25 mars 2020 - 09:21:36

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Clémence Nicolas, Laurent Fontaine, Véronique Montembault. Nitroxide radical-containing polynorbornenes by ring-opening metathesis polymerization as stabilizing agents for polyolefins. Polymer Chemistry, Royal Society of Chemistry - RSC, 2019, 10 (40), pp.5487-5497. ⟨10.1039/c9py00769e⟩. ⟨hal-02318934⟩

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