Rheological studies of energetic binder-plasticizer blends

ABSTRACT

Two azido ester plasticizers, bis(1,3-diazido prop-2-yl) malonate and bis(1,3-diazido prop-2-yl) glutarate, were mixed with three different binders, Glycidyl azido polymer (GAP), 3,3-bis-(azidomethyl)oxetane-tetrahydrofuran (BAMO-THF or BT) and 3- nitratomethyl-3-methyl oxetane or Poly NIMMO (PLN) in the ratio of 20:80 (w/w) to study their rheological properties. The addition of plasticizer has reduced the viscosity of three polymer blends, which improved the flow behaviour to an acceptable range. The change in activation energies of polymer blends is also calculated. For all the combination of blends, the rate of change in shear stress and linear range of strain with stress decreases after addition of plasticizers. Variation of viscosity with applied stress is unaffected initially and then increases significantly which limits the linear viscoelastic region (LVR) due to the dilution effect.

KEYWORDS:

• Energetic plasticizer
• energetic binder
• viscosity
• activation energy
• shear rate
• elastic modulus

Acknowledgments

Authors would like to thank the Vice Chancellor, DIAT for providing the infrastructural facilities and support. Authors are also thankful to Shree Javaid Athar, EMR Division, HEMRL, Pune for experimental assistance.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Dimple Kumari

Dr. Dimple Kumari obtained her M.Sc. (Chemistry) from Patna University, Patna (Bihar) and Ph.D. from Defence Institute of Advanced Technology, Pune (Maharashtra). She has done her postdoctoral research at IIT Bombay, India. Presently, she is working as an Assistant Professor in Department of Chemistry, College of Commerce, Arts and Science Patna (Bihar). Her research interests include organic synthesis, energetic materials and synthesis of nanomaterials.

Shaibal Banerjee

Dr. Shaibal Banerjee received his Ph.D. from IIT Bombay, India. He has done his postdoctoral research at the City College of New York and Virginia Tech, USA. At present he is an Associate Professor in the Defence Institute of Advanced Technology, Pune, India. His research interests include organic synthesis, high energy materials and nano materials.