Photo-switchable azobenzene-functionalized block copolymers from atom transfer radical polymerizations |
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| Authors: | Omer J. Chaudhary Nasir M. Ahmad |
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| Affiliation: | 1. Polymer Electronics Research Centre (PERC), School of Chemical Sciences, University of Auckland, Science Centre, Building 301, 23 Symonds Street, Auckland Central, Auckland-1142, New Zealand
2. Department of Materials Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), NUST H-12 Campus, Islamabad, 44000, Pakistan
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| Abstract: | Diblock copolymers composed of monomers of tert-butyl acrylate and a side-chain azobenzenecontaining monomer, 4-[(E)-(4-nitrophenyl)diazenyl]phenyl prop-2-enoate were synthesized using atom transfer radical polymerization technique. Experimental strategy involved synthesis of block of tert-butyl acrylate macroinitiator followed by addition of second block of azobenzene-containing monomer to prepare desired block-copolymer. GPC analysis indicated narrow molecular weight distributions with degree of polymerization found in good agreement with targeted value. Prepared block copolymers of varying chain lengths can potentially be used to obtain morphologies that can find useful applications for biomedical applications including intriguing photo-switchable drug delivery systems. |
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