Postfunctionalization of polyoxanorbornene backbone through the combination of bromination and nitroxide radical coupling reactions

Lale Nur Atici, Erhan Demirel, Umit Tunca, Gurkan Hizal, Hakan Durmaz*

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Özet

The brominated backbone of poly(oxanorbornene imide) (PONB) (PONB-Br) was functionalized with 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)-acrylate, -epoxy, and poly (ethylene glycol) (PEG) yielding PONB-acrylate, PONB-epoxy, and PONB-PEG through the nitroxide radical coupling (NRC) reaction. Although an excess amount of functional-TEMPOs were used. The observed NRC efficiencies were found in the range of 7-25%. Notably, 1H NMR spectra of all polymers exhibited a signal at 6.08 ppm after NRC reactions indicating rebuilding of the main chain double bond and further identified by 13C NMR analysis. The inevitable formation of double bond through the tendency of the recombination of the formed radicals was supported by a separate experiment conducted without utilizing functional-TEMPO. Besides, the versatility of the ROMP backbone further demonstrated by the introduction hetero functionality onto the polymer by a consecutive reactions.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)2381-2389
Sayfa sayısı9
DergiJournal of Polymer Science, Part A: Polymer Chemistry
Hacim53
Basın numarası20
DOI'lar
Yayın durumuYayınlandı - 15 Eki 2015

Bibliyografik not

Publisher Copyright:
© 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 2381-2389.

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