Photoinduced birefringence in blends of a polyurethane bearing azobenzene moieties and a poly(amide-imide) - Ceridório, Lucinéia Ferreira; Cardoso, Marcos Roberto; Pavinatto, Felippe José; Carvalho, Antonio Jose Felix; Mendonça, Cleber Renato; Balogh, Débora Terezia (Polymer International, 2006)