Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry
The cure kinetics of propellant slurry based on hydroxy-terminated polybutadiene (HTPB) and toluene diisocyanate (TDI) polyurethane reaction has been studied by viscosity build up method. The viscosity (ɳ)–time (t) plots conform to the exponential function ɳ = aebt, where a & b are empirical con...
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Wiley
2010-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2010/750393 |
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| author | Abhay K Mahanta Monika Goyal Devendra D Pathak |
| author_facet | Abhay K Mahanta Monika Goyal Devendra D Pathak |
| author_sort | Abhay K Mahanta |
| collection | DOAJ |
| description | The cure kinetics of propellant slurry based on hydroxy-terminated polybutadiene (HTPB) and toluene diisocyanate (TDI) polyurethane reaction has been studied by viscosity build up method. The viscosity (ɳ)–time (t) plots conform to the exponential function ɳ = aebt, where a & b are empirical constants. The rate constants (k) for viscosity build up at various shear rate (rpm), evaluated from the slope of dɳ/dt versus ɳ plots at different temperatures, were found to vary from 0.0032 to 0.0052 min-1. It was observed that the increasing shear rate did not have significant effect on the reaction rate constants for viscosity build up of the propellant slurry. The activation energy (Eɳ), calculated from the Arrhenius plots, was found to be 13.17±1.78 kJ mole-1, whereas the activation enthalpy (∆Hɳ*) and entropy (∆Sɳ*) of the propellant slurry, calculated from Eyring relationship, were found to be 10.48±1.78 kJ mole-1 and –258.51± 5.38 J mole-1K-1, respectively. The reaction quenching temperature of the propellant slurry was found to be -9 ° C, based upon the experimental data. This opens up an avenue for a “freeze-and-store”, then “warm-up and cast”, mode of manufacturing of very large solid rocket propellant grains. |
| format | Article |
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| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
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| series | E-Journal of Chemistry |
| spelling | doaj-art-ce3c3fc588414629af64b95712cefa0d2025-02-03T05:53:46ZengWileyE-Journal of Chemistry0973-49452090-98102010-01-017117117910.1155/2010/750393Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant SlurryAbhay K Mahanta0Monika Goyal1Devendra D Pathak2Defence Research & Development Organization, SF Complex, Jagdalpur-494001, IndiaDefence Research & Development Organization, SF Complex, Jagdalpur-494001, IndiaDepartment of Applied Chemistry, Indian School of Mines, Dhanbad-826004, IndiaThe cure kinetics of propellant slurry based on hydroxy-terminated polybutadiene (HTPB) and toluene diisocyanate (TDI) polyurethane reaction has been studied by viscosity build up method. The viscosity (ɳ)–time (t) plots conform to the exponential function ɳ = aebt, where a & b are empirical constants. The rate constants (k) for viscosity build up at various shear rate (rpm), evaluated from the slope of dɳ/dt versus ɳ plots at different temperatures, were found to vary from 0.0032 to 0.0052 min-1. It was observed that the increasing shear rate did not have significant effect on the reaction rate constants for viscosity build up of the propellant slurry. The activation energy (Eɳ), calculated from the Arrhenius plots, was found to be 13.17±1.78 kJ mole-1, whereas the activation enthalpy (∆Hɳ*) and entropy (∆Sɳ*) of the propellant slurry, calculated from Eyring relationship, were found to be 10.48±1.78 kJ mole-1 and –258.51± 5.38 J mole-1K-1, respectively. The reaction quenching temperature of the propellant slurry was found to be -9 ° C, based upon the experimental data. This opens up an avenue for a “freeze-and-store”, then “warm-up and cast”, mode of manufacturing of very large solid rocket propellant grains.http://dx.doi.org/10.1155/2010/750393 |
| spellingShingle | Abhay K Mahanta Monika Goyal Devendra D Pathak Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry E-Journal of Chemistry |
| title | Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry |
| title_full | Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry |
| title_fullStr | Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry |
| title_full_unstemmed | Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry |
| title_short | Rheokinetic Analysis of Hydroxy Terminated Polybutadiene Based Solid Propellant Slurry |
| title_sort | rheokinetic analysis of hydroxy terminated polybutadiene based solid propellant slurry |
| url | http://dx.doi.org/10.1155/2010/750393 |
| work_keys_str_mv | AT abhaykmahanta rheokineticanalysisofhydroxyterminatedpolybutadienebasedsolidpropellantslurry AT monikagoyal rheokineticanalysisofhydroxyterminatedpolybutadienebasedsolidpropellantslurry AT devendradpathak rheokineticanalysisofhydroxyterminatedpolybutadienebasedsolidpropellantslurry |