Graft Copolymers with Complex Polyether Structures: Poly(ethylene oxide)- graft -Poly(isobutyl vinyl ether) by Combination of Living Anionic and Photoinduced Cationic Graft Polymerization

Macromolecular Chemistry and Physics


Muhammet U. Kahveci, Christine Mangold, Holger Frey, Yusuf Yagci


A novel polymerization mechanism transformation strategy, involving anionic ring-opening polymerization and photoinduced cationic polymerization, is successfully applied for the synthesis of poly(ethylene oxide)-graft-poly(isobutyl vinyl ether) (PEO-g-PIBVE). First, poly(ethylene oxide-co-ethoxyl vinyl glycidyl ether) [P(EO-co-EVGE)] is synthesized by living anionic polymerization. The vinyl moieties of the functional PEO-based polymer are converted to the hydrogen iodide adduct by photolysis of diphenyliodonium iodide, monitored using NMR spectroscopy. A modified mode of Lewis acid-catalyzed living cationic polymerization is performed as a grafting from method to generate PIBVE segments grafted onto the PEO main chain. Both the intermediates and the final graft copolymers are characterized by gel-permeation chromato­graphy (GPC) and 1H NMR analysis.

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