Stabilizer reactions in cast double base rocket propellants. Part VII: Effect of lead-based ballistic modifiers on the reactions of propellant stabilizers during simulated aging of cast double base solid propellants

1996 ◽  
Vol 21 (2) ◽  
pp. 85-89 ◽  
Author(s):  
A. J. Bellamy ◽  
J. M. Bellerby ◽  
M. H. Sammour
Keyword(s):  
Solid Propellants ◽  
Rocket Propellants ◽  
Ballistic Modifiers ◽  
Double Base

Thermocouple Response Characteristics in Deflagrating Low-Conductivity Materials

1971 ◽  
Vol 93 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Nam P. Suh ◽  
C. L. Tsai
Keyword(s):  
Theoretical Model ◽  
Gas Phase ◽  
Wire Diameter ◽  
Solid Propellants ◽  
Optimum Ratio ◽  
Response Characteristics ◽  
Bead Diameter ◽  
Double Base ◽  
Theoretical Results ◽  
Good Agreement

The transient thermocouple response characteristics in deflagrating low-conductivity materials with high temperature gradients were investigated theoretically and experimentally. The theoretical model considers the thermocouple bead and lead wires separately, and the two resulting partial differential equations are solved simultaneously by a finite difference technique. The experimental results are obtained by embedding various size thermocouple wires in double-base solid propellants and consequently measuring the temperature profiles and the surface temperatures. The theoretical model is used to predict the experimentally measured temperatures. There is good agreement. The experimentally measured values are smaller than the correct surface temperature, corresponding to the model prediction for zero wire diameter, by at least 20 percent even when 1/2-mil thermocouple wire is used. Both the experimental and theoretical results show a plateau when the thermocouple bead emerges from the solid into the gas phase. The theoretical results also show that there is an optimum ratio of. the thermocouple bead diameter to the wire diameter, which is found to be close to three

scholarly journals Characterization of New Lead-free Ballistic Modifiers and Phthalate-free Plasticizers in Propellants

2020 ◽  
pp. 15-18
Author(s):  
Rosane Macchiarulo Jorge ◽  
Acácio Antonio Mesquita Furtado Filho
Keyword(s):  
Chemical Compound ◽  
Lead Free ◽  
Synthesis And Characterization ◽  
Ballistic Performance ◽  
Ballistic Modifiers ◽  
Reduced Toxicity ◽  
Double Base ◽  
Copper Salicylate

This paper describes the synthesis and characterization of a copper-based ballistic modifier, copper subsalicylate (monobasic copper salicylate), and its performance in green-type propellants. New lead-free ballistic modifiers and phthalatefree plasticizers with reduced toxicity, less harmful to the environment, have been employed to replace their traditional additives in green-type double-base propellant preparations. The characterization of the chemical compound was performed by FTIR, TGA-DSC, and WAXS, indicating that copper subsalicylate was obtained. The results of the characterization of propellant compositions showed that copper subsalicylate, in combination with a bismuth salt, could be a substitute for the traditional lead-based ballistic modifier producing green-type propellants without reducing ballistic performance.

Polysiloxane-based inhibition system for double-base rocket propellants

1998 ◽  
Vol 69 (1) ◽  
pp. 7-12 ◽  
Author(s):  
J. P. Agrawal ◽  
S. Venugopalan ◽  
Javed Athar ◽  
J. V. Sabane ◽  
M. Muralidharan
Keyword(s):  
Rocket Propellants ◽  
Double Base
Sign in / Sign up

Export Citation Format

Share Document