Shear Thickening Behaviour of Composite Propellant Suspension under Oscillatory Shear

D. Singh; G. Dombe; C. Bhongale; P. P. Singh; Mehilal Maurya; B. Bhattacharya

doi:10.14429/dsj.66.8849

D. Singh High Energy Materials Research Laboratory, Pune
G. Dombe High Energy Materials Research Laboratory, Pune
C. Bhongale Department of Applied Chemistry, Defence Institute of Advanced Technology, Pune
P. P. Singh High Energy Materials Research Laboratory, Pune
Mehilal Maurya High Energy Materials Research Laboratory, Pune
B. Bhattacharya High Energy Materials Research Laboratory, Pune

DOI: https://doi.org/10.14429/dsj.66.8849

Keywords: Shear thickening, amplitude sweep, packing fraction, composite propellant, rheology

Abstract

Composite propellant suspensions consist of highly filled polymeric system wherein solid particles of different sizes and shapes are dispersed in a polymeric matrix. The rheological behaviour of a propellant suspension is characterised by viscoplasticity and shear rate and time dependant viscosity. The behaviour of composite propellant suspension has been studied under amplitude sweep test where tests were performed by continuously varying strain amplitude (strain in %, γ) by keeping the frequency and temperature constant and results are plotted in terms of log γ (strain amplitude) vs logGʹ and logGʺ (Storage modulus and loss modulus, respectively). It is clear from amplitude sweep test that dynamic moduli and complex viscosity show marked increase at critical strain amplitude after a plateau region, infering a shear thickening behaviour.

Author Biographies

D. Singh, High Energy Materials Research Laboratory, Pune

Mrs Darshana Singh received her BTech (Chemical Engg) from N N Nagpur U University in 2003 and ME (Chemical Engg) from IISc, Bangalore in 2012. Presently working as Scientist ‘D’ at HEMRL, Pune. She is actively involved in processing of composite solid rocket propellants. Her area of specialisation is analysis of flow behaviour of composite propellant slurry and its rheological properties.

G. Dombe, High Energy Materials Research Laboratory, Pune

Mr Ganesh Dombe received his BE (Chemical Eng.) from Shivaji University, Kolhapur in 2001 and MTech in Chemical Engg. From IIT, Madras in 2003. Presently he is working as Scientist ‘E’ at HEMRL. He is working in the field of development and processing of composite propellant. His area of interest is rheology of concentrated suspensions and mixing of highly viscous suspensions.

C. Bhongale, Department of Applied Chemistry, Defence Institute of Advanced Technology, Pune

Dr Chetan Bhongale obtained his PhD in Chemistry from University of Pune Presently he is working as A Astt. Peofessor at DIAT, Pune. His areas of reserch include organic photovoltaics, functional organic nanocrystals, mesoporous materials, etc.

P. P. Singh, High Energy Materials Research Laboratory, Pune

Mr P.P. Singh obtained his BTech (Chemical Eng.) from Harcourt Butler Technology Institute, Kanpur, in 1992 and presently working as a Joint Director at HEMRL, Pune. His area of research include: Solid rocket propellant processing.

Mehilal Maurya, High Energy Materials Research Laboratory, Pune

Dr Mehilal received his PhD in Chemistry from Allahabad University in 1985. Presently working as a Joint Director at HEMRL, Pune. He made significant contributions in the field of plastic- bonded explosives. Presently he is working in the field of solid rocket propellants.

B. Bhattacharya, High Energy Materials Research Laboratory, Pune

Mr B. Bhattacharya obtained his MTech (Chemical Engg.) from Banaras Hindu University, Varanasi. His area of research includes: Processing of composite propellants. He had served as Director, HEMRL, Pune.

Shear Thickening Behaviour of Composite Propellant Suspension under Oscillatory Shear

Abstract

Author Biographies

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