Issue 14, 2016

A photo-induced nitroxide trapping method to prepare α,ω-heterotelechelic polymers

Abstract

Two types of photoactive polymers with an alkoxyphenyl ketone moiety at their backbone centers were synthesized through atom transfer radical polymerization. A facile protocol for preparing α,ω-heterotelechelic polymers was developed, employing nitroxide with different functional groups (e.g., hydroxyl, propargyl, glycidyl, and polyethylene glycol) coupled with macromolecular radicals generated via the Norrish-type I photoreaction under mild UV irradiation from the said polymers. Experimental conditions such as solvent effects and irradiaton time were investigated to optimize the efficiency of reaction functionality. The number-average molecular weights of the photoactive polymers and α,ω-heterotelechelic polymers were determined by gel permeation chromatography. Material structures were further confirmed by 1H NMR and FT-IR spectroscopy. The end group activity of α,ω-heterotelechelic polymers obtained from this reaction was further demonstrated using the Cu-catalyzed azide–alkyne click reactions between PS-N3 and polystyrene capped with a propargyl group.

Graphical abstract: A photo-induced nitroxide trapping method to prepare α,ω-heterotelechelic polymers

Supplementary files

Article information

Article type
Paper
Submitted
20 Jan 2016
Accepted
02 Mar 2016
First published
15 Mar 2016

Polym. Chem., 2016,7, 2511-2520

A photo-induced nitroxide trapping method to prepare α,ω-heterotelechelic polymers

J. Su, H. Huang, Y. Cui, Y. Chen and X. Liu, Polym. Chem., 2016, 7, 2511 DOI: 10.1039/C6PY00104A

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