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Synthesis of urethane—acrylic multi-block copolymers via electrochemically mediated ATRP

Pawel Chmielarz and Andrzej Sobkowiak

Department of Physical Chemistry, Faculty of Chemistry, Rzeszów University of Technology, Al. Powstancdw Warszawy 6, 35-959 Rzeszów, Poland

 

E-mail: pchmiel@prz.edu.pl

Abstract: The electrochemically mediated atom transfer radical polymerisation (eATRP) of n-butyl acrylate was investigated under a variety of catalyst concentrations. Poly(n-butyl acry late)- block-polyurethane-block-poly (n-butyl acrylate) copolymers were prepared via electrochemically mediated atom transfer radical polymerisation (eATRP) using only 7 × 10–6 mole % of CuII complex. The successful chain extension and formation of penta-block copolymers confirmed the living nature of the poly(alkyl acrylates) prepared by eATRP. In this work, the tri-block and penta-block urethane-acrylate copolymers were synthesised for the first time by using tertiary bromine-terminated polyurethane macro-initiators as transitional products reacting with n-butyl acrylate, and subsequently with tert-butyl acrylate in the presence of the CuIIBr2/TPMA catalyst complex. The results of 1H NMR spectral studies support the formation of tri-block poly (n-butyl acrylate)-block-polyurethane-block-poly(n-butyl acrylate) copolymers, and penta-block poly(tert-butyl acrylate)-block-poly (n-butyl acry late)-block-polyurethane-block-poly (n-butyl acrylate)- block-poly(tert-butyl acrylate) copolymers.

Keywords: polymer synthesis – eATRP – copolymers – polyurethanes – polyacrylates

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2016-0054

 

Chemical Papers 70 (9) 1228–1237 (2016)

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