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  • Chem Sci Trans., 2015, 4(1),  pp 181-193  

    DOI:10.7598/cst2015.954

    Research Article

    Model free Multiple Heating Rate Degradation Kinetic Studies of Modified Celluloses

  • SATISH KUMAR1, MAHESH KUMAR2, SOHAN LAL3, SANDEEP KUMAR4 and SANJIV ARORA3*
  • 1Department of Chemistry, University College, Kurukshetra University, Kurukshetra–136119, India
    2Department of Chemistry, Mukand Lal National College, Yamuna Nagar–135001, India
    3Department of Chemistry, Kurukshetra University, Kurukshetra–136119, India
    4Department of Physics, Hindu College, Sonipat–131001, India
  • Abstract

    The present paper depicts about the synthesis of cellulose ethyl ammonium thiophosphate (CEASP) and its metal complexes with Cd, Mo and Ce. CEASP and its metal complexes have been characterized by infrared (IR), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDXS) studies. The surface morphology of samples has been premeditated by means of scanning electron microscopy (SEM). The thermal studies of samples have been carried out at multiple heating rates 2, 5, 10 and 20 o°C min-1 from ambient to 700 oC in nitrogen atmosphere. Non-isothermal model free kinetic methods have been used to calculate activation energy of samples i.e. Friedman, Ozawa-Flynn-Wall (O-F-W) and modified Coats- Redfern. The activation energy of samples lie in range 72-282 kJ mol-1. Thermal study shows that initial degradation temperature of CEASP and its metal complexes decreases and there is abrupt increase in char yield of synthesized samples as compared to pure cellulose. These and other related information suggest that such type of derivatisation could be proved a good flame retardant for cellulose.

    Keywords

    Cellulose, Model Free Kinetics, Flame Retardant, Activation energy

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