Science Journal of Chemistry

Volume 4, Issue 2, April 2016

  • Water Vapour Permeability and Wet Rub Fastness of Finished Leathers - Effect of Acrylic Polymer Dispersion Formulations

    Michael Ifeanyichukwu Ugbaja, Amali Ejila, Paul Andrew Mamza, Isaac Ndubuisi Mbada

    Issue: Volume 4, Issue 2, April 2016
    Pages: 14-18
    Received: 7 January 2016
    Accepted: 26 January 2016
    Published: 5 April 2016
    Abstract: The water vapourpermeability and wet rub fastness of leathers finished with acrylic polymer based resin binder was carried out using the popular water vapour permeability cup method and the VESLIC test method respectively. Five formulations (125 g, 150 g, 175 g, 200 g and 250 g) of the binder which was the factor varied in this experiment, was prep... Show More
  • Oxidation of Caffeine by Permanganate Ion in Perchloric and Sulfuric Acids Solutions: A Comparative Kinetic Study

    Ahmed Fawzy, Ishaq A. Zaafarany, Khalid S. Khairou, Layla S. Almazroai, Tahani M. Bawazeer, Badriah A. Al-Jahdali

    Issue: Volume 4, Issue 2, April 2016
    Pages: 19-28
    Received: 5 April 2016
    Accepted: 12 April 2016
    Published: 3 May 2016
    Abstract: The kinetics of oxidations of caffeine by permanganate ion in both perchloric and sulfuric acids solutions have been investigated spectrophotometrically at a constant ionic strength of 1.0 mol dm-3 and at 25°C. In both acids, the reaction-time curves were obtained with a sigmoid profile suggesting an autocatalytic effect caused by Mn(II) ions forme... Show More