Synthesis of luminescent polyurethane with pi-conjugated segment in main chain

Although the polyurethane (PU) is one of the most classic materials, it is still attractive for its wide diversity in structures and applications. For example, PU is blended with the conductive polyaniline (PAni) and the ultra high dielectric constant is afforded. The Pb(Mg1/3Nb2/3)O3-PbTiO3/PU composite exhibits a higher dielectric constant while electrical conductivity of PU filled with carbon black yet presents significantly lower. The thermo-responsive polyurethane was prepared from 2-methylaziridine and supercritical carbon dioxide. Magnetic nano-particles containing PU were prepared by urethane and acrylic acid. Most of other researches on the PU focus on changing their mechanical properties by adjusting the species or ratios of hard segments and soft ones. In this paper, one simple route is provided to introduce the PL property into general polymeric materials, PU.