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Browsing Thesis by Author "GUCHHAIT, SUKUMAR"

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    KINETICS AND MECHANISM OF THE AQUAS AND EMULSION POLYMERIZATION OF VINYLE MONOMAR (METHACRYLONITRILE)
    (UNIVERSITY OF BURDWAN, 1991) GUCHHAIT, SUKUMAR
    The present thesis reports the work done in aqueous and emulsion polymerizations of methacrylonitrile (MAN) monomer. This includes the kinetic investigation of methacrylonitrile polymerization in the presence of sodium Lauryl sulphate (NaLS) as micelle generator and potassium persulphate (KPS) as initiator. In order to understand the role of micelle generator in emulsion polymerization of methacrylonitrile, the polymerization has also been investigated in the absence of micelle generator. In order to throw light on the mode of the chain initiation, the mechanism of potassium persulphate decomposition in the presence of methacrylonitrile has been studied. A comparative study on the polymerizations of acrylonitrile and of methacrylonitrile has been made and a mechanism for the growth of polymers of methacrylonitrile has been postulated on the basis of experimental results. Besides, comprehensive reviews on (i) a4ueous and emulsion polymerization of vinyl monomers in general (ii) polymerization of acrylonitrile and methacrylonitrile and (iii) thermal decomposition of potassium persulphate in 84ueous solutions have been written in Chapter I and II.