• GAURAV R GUPTA

      Articles written in Bulletin of Materials Science

    • Studies of thermally assisted interactions of polysulphide polymer with ionic liquids

      NANDKISHOR B SHIRSATH GAURAV R GUPTA VIKAS V GITE JYOTSNA S MESHRAM

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      The present paper, for the first time, reports analysis regarding the structural interactions of polysulphide polymer with ionic liquids (ILs), which have been studied by thermo-gravimetry analysis (TGA). A systematic thermal analysis of polysulphide polymer has been carried out, based on polymerization and series of ILs like tetrabutyl ammonium hexa-fluorophosphate [TBA][PF$_6$], N-butylpyridinium bromide [Bpy][Br] and 1-butyl-3-methyl imidazolium bromide [Bmim][Br] using a thermal gravimetry analyser. The plausible mechanism of the interactions and thermally induced reactions of polysulphide polymer with ILs has been advanced and discussed. The probable interactions of polysulphide polymer with [Bmim][Br] and [TBA][PF$_6$] are also discussed. The interactions between polysulphide polymer and ILs were confirmed by Fourier transform-infrared spectroscopy, TGA–differential thermo-gravimetry analysis and field emission scanning electron microscopy analysis.

    • Unprecedented exploration of ionic liquids as additives which astonishes the thermal stability of PVC formulations

      GAURAV R GUPTA MAHENDRA R NEVARE AMARDIP M PATIL VIKAS V GITE

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      he use of ionic liquids as additives and an economic and environmentally benign alternative to conventional inorganic and organic additives in poly(vinyl chloride) (PVC) formulation is investigated by using thermogravimetric anal-ysis. The present study deals with an elegant exploration of the resulting thermal profiles to disclose the pattern of thermal degradation for $N$-butylpyridinium hexafluorophosphate and PVC formulation as well. Furthermore, non-isothermal kinetic investigations providing sound information about kinetic parameters, such as activation energy and frequency factor by using the Coats–Redfern equation in the temperature range of 593–663 K for $N$-butylpyridinium hexafluorophosphate and 423–473 K for the resulting PVC formulation were performed.

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