Azidation of Polyvinyl Nitrate and Energy Related Studies

  • S.N. Mishra Institute of Armament Technology ,Pune.
  • Jyotsna Pant Institute of Armament Technology ,Pune.
  • P.K. Dutta Institute of Armament Technology ,Pune.
  • U.C. Durgapal Institute of Armament Technology ,Pune.
Keywords: Differential scanning calorimetry, Substituted polyvinyl azide

Abstract

Partially substituted polyvinyl azide (PVAZ) samples were prepared by reacting sodium azide with polyvinyl nitrate (PVN), containing 15.71 per cent N, in a solution of dimethyl formamide. Replacement of a large proportion of -ONO2 groups by - N3 groups in polymer chain ('azidation' of PVN) enhanced reactivity, impact sensitivity and energetics, but reduced thermal stability of the products. The thermogravimetric analysis of PVN showed the onset of rapid decomposition at about 171 °C. The kinetic analysis of thermogravimetric results indicated the validity of random nucleation first-order reaction model. A differential scanning calorimetry thermogram of PVAZ showed a peak at 183.9 °c and heat of decomposition of 2732 J/g, which is lower than that for PVN.

Author Biographies

S.N. Mishra, Institute of Armament Technology ,Pune.
Dr S.N.Mishra obtained his MSc (Chem) from Kumaon Univtrsity in 1986 and PhD (Chem) from University of Pune in 1995 while working at the Institute of Arll1ament Technology (IA T), rune. He has been at IA T as Research fellow and ,Research AssocIate under various Aeronutical.Research & Development Board & Defence Grants-in-Aid projects for the last eight 'years. His field of interests are synthesis and characterisation of explosives, propellants and pyrtechnies.
Jyotsna Pant, Institute of Armament Technology ,Pune.
Dr Jyotsna Pant obtained her PhD in Chemistry from Rajasthan University in 1983. She has worked as Lecturer, Research Fellow and Research Associate in Govt College, Garhwal, University of Rajasthan, National Defence Academy, Pune and Institute of Armament Technology, Pune. She worked as Research Associate at the Institute of Armament Technology (IAT), Pune, under an Aeronautical Research & Development Board (ARDB) project (1991-93). She has published Qumber Gf research papers.
P.K. Dutta, Institute of Armament Technology ,Pune.
Prof  PK Dutta, Scientist (Retd) worked as Professor at the Institute of Armament Technology (IAT),IPune and carried out research in propellant technology. He has published large number of research papers in the field of propellant technology. He has successfully completed various research projects of Aeronautical Research& Development Board and Defence Grants-in-Aid.
U.C. Durgapal, Institute of Armament Technology ,Pune.
Prof U.C. Durgapal, fonner Director, Institute- of Annament Technology, Pune, is a member of Aeronautical Society of India and High Energy Materials Society of India. He had been teaching and doing research in the field of propulsion, combustion, and chemistry and technology of energetiCj: materials for the last 38 years in various laboratories/establishments in DRDO and outside including Birla Institute M Technology, Ranchi, where he was Visiting Professor fot 'hree years. 'He has published more than 50 research papers. His current research interests include. hybrid and ram rockets, hypervelocity propulsion for guns, gas dynamic lasers and supersonic combustion.
Published
2013-01-01
How to Cite
Mishra, S., Pant, J., Dutta, P., & Durgapal, U. (2013). Azidation of Polyvinyl Nitrate and Energy Related Studies. Defence Science Journal, 47(2), 131-137. https://doi.org/10.14429/dsj.47.3985
Section
Armaments & Explosives