1. Polyethylene-g-poly(cyclohexene oxide) by Mechanistic Transformation from ROMP to Visible Light-Induced Free Radical Promoted Cationic Polymerization.
- Author
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Mustafa Ciftci, Senem Kork, Guangjuan Xu, Buchmeiser, Michael R., and Yusuf Yagci
- Subjects
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POLYETHYLENE , *CYCLOHEXENE , *FREE radicals , *ADDITION polymerization , *VISIBLE spectra , *NUCLEAR magnetic resonance , *DIFFERENTIAL scanning calorimetry - Abstract
A novel polymerization mechanism transformation strategy, combining ring-opening metathesis polymerization (ROMP) and visible light induced cationic polymerization, is successfully applied for the synthesis of polyethylene-graft-poly(cyclohexene oxide) (PE-g-PCHO). First, cis-cyclooctene (COE) was polymerized via ROMP in the presence of a chain transfer agent and quantitatively hydrobrominated to give bromo functional polyethylene (PE-Br). Subsequent irradiation of PE-Br in the visible range using dimanganese decacarbonyl (Mn2(CO)10) and diphenyl iodonium hexafluorophosphate (Ph2I+PF6-) as radical generator and oxidant, respectively, initiated cationic polymerization of cyclohexene oxide (CHO) resulting in the formation of PE-g-PCHO. The effect of irradiation time and Mn2(CO)10 concentration on the grafting density and efficiency was evaluated. Both the precursor polymers and the corresponding graft copolymers were characterized by ¹H NMR and Fourier transform infrared (FT-IR) spectroscopy, gel-permeation chromatography (GPC), and differential scanning calorimetric (DSC) analyses. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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