Abstract
A hyperbranched polyamine with s-triazine unit based on 2,4,6-trichloro-s-triazine and 4,4'-oxydianiline has been synthesized by using A2+B3 approach. This polyamine was characterized by FT-IR, UV-visible, 1H NMR, 13C NMR spectroscopic, elemental analysis, measurement of solution viscosity, X-ray diffraction and solubility studies. The terminal amino groups of the polymer were dye end capped by methyl red moiety. The hyperbranched polyamine found to display strong fluorescence from 350 nm to 650 nm in DMSO solution. The fluorescence intensity increased significantly by end capping with methyl red. The hyperbranched polyamine also exhibit pH sensitive fluorescence and the intensity increases with the increase of pH of the medium. The Cu2+ ion quenched the fluorescence of the polymer solution noticeably. The polymer solution also shows the increase of fluorescence intensity with the decrease in concentration of polymer. The hyperbranched polyamine was soluble only highly polar solvents and exhibits low viscosity (ηinh = 0.15 dL/g). The thermal analyses indicate that the polymer is thermostable upto 300 °C with glass transition (Tg) temperature 238 °C, while by end capping Tg further increased to 271 °C. The polymer also exhibits self-extinguishing characteristic as found by limiting oxygen index (LOI) value measurement.
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Mahapatra, S., Karak, N. Fluorescent Hyperbranched Polyamine with s-Triazine: Synthesis, Characterization and Properties Evaluation. Polym J 41, 20–25 (2009). https://doi.org/10.1295/polymj.PJ2008119
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DOI: https://doi.org/10.1295/polymj.PJ2008119
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