Mechanical properties of composite solid rocket propellant are one of the most important propellant specifications and also improvement of the interfacial interactions between bonding agents and solid particles is a demand for composite solid propellants in order to withstand stresses produced due to various loading conditions, changes in environmental condition, transportation and handling. In this work, long chain bonding agent prepared from the reaction of fatty monocarboxylic acid and dicarboxylic acid with methyl aziridinyl phosphine oxide (MAPO) to form (MSA) bonding agent which is improved the mechanical properties especially strain value corresponding to stress value which gives the highest value in formulation B1 but with low yield properties. Also using an percentage of MAPO as a mixed bonding agent in order to increase the yield properties of the propellant has a significant effect on mechanical properties as giving high value of Young′s modulus and good strain value with the percentage of 0.1 % of MAPO and 0.2 % of MSA then by changing the curing agent using IPDI instead of HMDI also gives a remarkable mechanical properties as high strain corresponding stress with a good value with modulus in formulation CI2.
Abstract. An effective pathway was explored to design and select proper bonding agents that could effectively improve the interfacial interactions between bonding agents and solid particles, modern types of composite solid propellants focused on increasing the mechanical properties in order to withstand stresses produced due to various loading conditions, changes in environmental condition, transportation and handling. In this work, the study show that the effect of solvent in production of bonding agent has a different impact on the mechanical properties as the polar solvent in formulation S3 has a good strain values corresponding to the stress. Also the changing of the percentage of CuCl2 has a significant effect on mechanical properties as giving high value of strain with the percentage of 4.5 % and returns back the value of strain decrease with increase the percentage of CuCl2 to give the lowest values of the strain corresponding to the stress value with percentage 7.5 %.
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