Abstract

DE LOS SANTOS, Gladys et al. Preparación de copolímeros fotoactivos por polimerización radicálica por transferencia de átomo (ATRP). Rev. Soc. Quím. Méx [online]. 2004, vol.48, n.4, pp.332-337. ISSN 0583-7693.

The synthesis and copolymerization of photoactive monomers derived from de N-(2-methacryoxyethyl)-6-nitrospiroben-zopyranindoline and methyl methacrylate prepared by atom transfer radical polymerization is reported. Copolymers with controlled molecular weight (20,000) and narrow polydispersity index (1.19) were obtained. The catalytic system was integrated by bipyridine/Cu(I) complexes and some alkyl bromides (Ethyl-2-bromopropionate, 3-bromopropene and p-toluensulfonyl chloride) were used as initiators. By applying this methodology, 10% of the photoactive molecules were incorporated into the main acrylic chain in order to prepare random copolymers. Thin films supported on quartz were prepared by spin coating, which are able to develop a deep blue color (580 nm in the absorption spectra) when exposed to UV light.

Keywords : photochromism; photochromic polymers; living radical polymerization; atom transfer radical polymerization.