Photoinduced behavior of epoxy networks modified with Disperse Orange 3

OROFINO, ANTONELA; SÁIZ LUCIANA; OYANGUREN PATRICIA; GALANTE M. JOSÉ

San José

Simposio; 12th Latin American Symposium on Polymers (SLAP-2010) and 10th Ibero American Conference of Polymers (CIP-2010); 2010

Polymers containing azobenzene moieties have been intensively investigated for their unique photoresponsive properties. A variety of photoinduced responses have been observed for azo polymers, such as phase transition, chromophore orientation and surface relief grating formation. The photoresponse of the polymers is based on cis/trans photoisomerization of azobenzene groups and is affected by the mobility of the groups and any supramolecular order of the polymer. In this study, the photoinduced behaviour of the polymers is investigated in terms of dichroism and birefringence for two different epoxy based azo polymers: epoxy-isocianate and epoxy-acid. A push-pull azo dye, Disperse Orange 3 (DO3), was selected as a photosensitive molecule.