Artículos de revistas
Epoxy-based azopolymers with enhanced photoresponsive properties obtained by cationic homopolymerization
Fecha
2017-09-22Registro en:
Ollier Primiano, Romina Paola; Arenas, Gustavo Francisco; Galante, Maria Jose; Schroeder, Walter Fabian; Oyanguren, Patricia Angelica; Victorel, Marianela; et al.; Epoxy-based azopolymers with enhanced photoresponsive properties obtained by cationic homopolymerization; Wiley VCH Verlag; Macromolecular Materials and Engineering (print); 302; 11; 22-9-2017; 1700311
1438-7492
CONICET Digital
CONICET
Autor
Ollier Primiano, Romina Paola
Victorel, Marianela
Arenas, Gustavo Francisco
Oyanguren, Patricia Angelica
Galante, Maria Jose
Schroeder, Walter Fabian
Resumen
Azopolymers are highly versatile materials due to their unique photoresponsive properties. In this contribution, a novel azo-modified epoxy network is synthesized by cationic homopolymerization with boron trifluoride monoethylamine (BF3.MEA) complex as initiator. The effect of the addition of a fixed content of amino-functionalized azo chromophore, Disperse Orange 3, into the polymer matrix is studied in detail. First of all, the thermal curing cycle is optimized by means of differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) measurements. Then, the resulting bulk azo-modified epoxy networks are characterized by means of thermogravimetric analysis (TGA), FTIR, DSC, UV–vis spectroscopy, and rheological measurements. Finally, the optical response of thin films of these materials is determined. The results evidence that azo-modified epoxy networks obtained by cationic polymerization with optimized curing cycle display high Tg values, high maximum photoinduced birefringence, fast writing speed, and exceptionally high remnant anisotropy. Therefore, this material is a promising candidate to be used for optical storage applications.