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Norbornene-functionalized PEO- b -PCL: A versatile platform for mikto-arm star, umbrella-like, and comb-like graft copolymers

Abstract : Well-defined in-chain norbornene-functionalized poly(ethylene oxide)-b-poly(ɛ-caprolactone) copolymers (NB-PEO-b-PCL) were synthesized from a dual clickable containing both hydroxyl- and alkyne-reactive groups, namely heterofunctional norbornene 3-exo-(2-exo-(hydroxymethyl)norborn-5-enyl)methyl hexynoate. A range of NB-PEO-b-PCL copolymers were obtained using a combination of orthogonal organocatalyzed ring-opening polymerization (ROP) and click copper-catalyzed azide–alkyne cycloaddition (CuAAC). Ring-opening metathesis polymerization (ROMP) of NB-PEO-b-PCL macromonomers using ruthenium-based Grubbs’ catalysts provides comb-like and umbrella-like graft copolymers bearing both PEO and PCL grafts on each monomer unit. Mikto-arm star A2B2 copolymers were obtained through a new strategy based on thiol–norbornene photoinitiated click chemistry between 1,3-propanedithiol and NB-PEO-b-PCL. The results demonstrate that in-chain NB-PEO-b-PCL copolymers can be used as a platform to prepare mikto-arm star, umbrella-, and comb-like graft copolymers.
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https://hal-univ-lemans.archives-ouvertes.fr/hal-01902797
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Soumis le : mardi 23 octobre 2018 - 18:25:46
Dernière modification le : jeudi 28 avril 2022 - 15:26:02

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Duc Anh N'Guyen, V. Montembault, Sandie Piogé, Sagrario Pascual, Laurent Fontaine. Norbornene-functionalized PEO- b -PCL: A versatile platform for mikto-arm star, umbrella-like, and comb-like graft copolymers. Journal of Polymer Science Part A: Polymer Chemistry, Wiley, 2017, 55 (24), pp.4051 - 4061. ⟨10.1002/pola.28876⟩. ⟨hal-01902797⟩

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