Synthesis of Long Chain Bonding Agent of CSRP and its Effect on Propellant Mechanical Properties

Abstract

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.

Research Advances in Bonding Agents for Composite Propellants

“…Bonding agents for composite propellants containing AP as oxidizer are investigated in depth by various research groups. However, for nitramine based energetic fillers such as HMX (cyclotetramethylene tetranitramine) and RDX (cyclotrimethylene trinitramine) very limited bonding agents are explored . Allen has reported that animal‐derived water‐soluble collagen protein for encapsulating the nitramine oxidizers.…”

“…The dewetting problem can be reduced by coating the solid particle surface with coupling agents which forms physical bonds with the binder matrix. In recent times, various bonding agents are being used in the field of composite propellant . This review focuses on the development of bonding agents employed in composite propellants.…”

“…A wide range of bonding agents are known and their effect on the mechanical behavior of composite propellant studied by various authors . For better comprehension of the field, these bonding agents will be discussed in details under the following categories:…”

Improvement of Interfacial Properties Between Cis‐1,4‐polybutadiene Rubber and HMX Crystal

“…In recent years, scholars have conducted various studies on the interface interaction of explosive composite particles [8–12] . One of the common methods is adding a bonding agent to composite particles, which can improve the coating effect of the binder on the explosive crystals and enhance the mechanical properties [13–17] . Zhang et al [18,19] .…”

Synthesis of Polyetheramine Based Bonding Agents and Their Effect on Mechanical Properties of an AP/CL‐20/GAP Formulation

“…In the development of solid rocket motors, the mechanical properties of solid propellants have become more challenging to achieve [1]. With the increase in the ratio of length to diameter for long‐range rockets, the flexible deformation of the missile body and its effects on ballistic performance have attracted more attention [2].…”