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Facile functionalization of isotactic polypropylene via click chemistry

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Abstract

We report here a new strategy for facile functionalization of isotactic polypropylene (iPP) via click chemistry. iPP bearing trimethylsilyl (TMS) protected alkynyl groups was prepared through copolymerization of propylene with a small amount of functional α-olefins with a zirconocene complex/AliBu3/[Ph3C][B(C6F5)4] catalytic system. The obtained copolymers exhibited high molecular weights beyond 2.0 × 105 and unimodal molecular distributions, with comonomer incorporation in the range of 1 to 4 mol% while maintaining good isotacticity ([mmmm] > 94%). Functionalization of the copolymers was achieved via TMS deprotection and click reactions in one-pot, providing a facile and efficient route to scalable fabrication of iPPs with diverse functionalities and improved physical properties. For instance, polyethylene glycol (PEG) was successfully grafted onto iPP polymer chains with a weight percentage up to 71.1%. Consequently, the hydrophilicity of the resultant copolymer was remarkably enhanced as revealed by the three times larger swelling of PEG-functionalized iPP after soaking in water for only a few minutes.

Graphical abstract: Facile functionalization of isotactic polypropylene via click chemistry

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Publication details

The article was received on 14 Aug 2019, accepted on 02 Nov 2019 and first published on 04 Nov 2019


Article type: Paper
DOI: 10.1039/C9PY01225G
Polym. Chem., 2019, Advance Article

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    Facile functionalization of isotactic polypropylene via click chemistry

    Y. Li, D. Song, L. Pan, Z. Ma and Y. Li, Polym. Chem., 2019, Advance Article , DOI: 10.1039/C9PY01225G

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