STM Journals Peer-reviewed research from Consortium e-Learning Network

4 publications

  • Published Subscription

    Thermally Stimulated Luminescence and Electron Spin Resonance Study of Gamma Irradiated Poly Carbonate

    By B. Sanjeeva Rao, M. Papi Reddy, A. Raju, S. Kalahasti, E. Venkateshwar Rao

    Abstract: Polycarbonate (PC) is an industrially important polymer. Gamma irradiation effects of PC are investigated by thermally stimulated luminescence (TSL) and electron spin resonance (ESR) techniques. The TSL spectra of irradiated PC have shown two glow peaks, around 149oC (422 K) and 165oC (438 K). The observed glow peaks are analysed by initial rise methods, Chen’s method and modified initial rise method. The trap parameters corresponding to the two glow peaks …

    Published in Emerging Trends in Chemical Engineering · Vol. 4, Issue 2, 2017 · pp. 23–39 Read article

  • Published Subscription

    Modification of Acrylonitrile-Methylacrylate Copolymer by Gamma Irradiation

    By B. Sanjeeva Rao, S Kalahasthi, EV Rao, B Sabitha

    Abstract: AbstractRadiative degradation of acrylonitrile-methylacrylate (AM) copolymer has been investigated by electron spin resonance (ESR) and infrared (IR) spectroscopy. The ESR spectrum observed for AM copolymer irradiated to a dose of 12 Mrad is a triplet with an intensity ratio of 1:3:1. The ESR spectrum is simulated by total-curve-fitting method and component spectra are generated. Magnetic parameters of component spectra are evaluated. Component triplet spectrum with magnetic parameters ni=3, mi=1 is …

    Published in Journal of Polymer & Composites · Vol. 3, Issue 3, 2015 · pp. 16–19 Read article

  • Published Subscription

    Application of Bloch Analysis to Evaluate Activation of Energy of Irradiated Polyacrylonitrile

    By B. Sanjeeva Rao, J. Muralidhar, R. Jeevan Kumar, Md. Yousuf Hussain Ansari, B. Suresh Babu

    Abstract: AbstractPolyacrylonitile is one of the important polymers of technical and scientific importance. During its usage, the polymer is exposed to different types of radiations, limiting its use. In order to investigate the processes involved in radiation effect in PAN, various efforts have been made. In this context, the authors have also made an attempt to investigate radiation induced process in PAN by electron spin resonance (ESR) technique. ESR spectra of …

    Published in Journal of Polymer & Composites · Vol. 4, Issue 2, 2016 · pp. 25–28 Read article

  • Published Subscription

    Characterization and Gamma Irradiated MA-EMA Copolymer by ESR and FTIR Techniques

    By B. Sanjeeva Rao, N. Srinivasa Rao, B. Suresh Babu, M. Papi Reddy

    Abstract: AbstractGamma irradiation effect of methacrylamide-ethyl methacrylate (MA-EMA) copolymer has been investigated by electron spin resonance (ESR) and Fourier Transform infrared (FTIR) spectroscopic techniques. The ESR spectrum observed for gamma irradiated MA-EMA copolymer has shown resolved hyperfine (hf) pattern at lower temperatures (77K) while at higher temperatures the spectrum is appeared to be broadened. Fourier Transform Infrared spectra of pure and gamma irradiated MA-EMA copolymer have been recorded for the copolymer …

    Published in Journal of Polymer & Composites · Vol. 4, Issue 3, 2016 · pp. 40–44 Read article

Support