Binder oxidation

T.P. Hobin, "The Binder/Oxidant Interface in Plastic Propellant , Rept No ERDE-TR-10, TRC BR-18126, Waltham Abbey (Engl)... 

Basically, PVC plastisol propellants are systems of binder,.oxidizer, and metallic fuel (if used). Minor ingredients, normally comprising less than 2% of the total, consist of wetting agent, stabilizer, opacifier, and burning rate modifier. The composition of three typical PVC plastisol propellants is shown in Table I. 

Other Propellant Chemicals. In addition to the binder, oxidizer, and fuel, a solid propellant may have a variety of other chemicals added (usually in small amounts) for specific purposes. These include ... 

A major advance in propellant technology occurred when it was discovered that metallic fuels could be incorporated into the binder-oxidizer mixture to give higher energy as well as higher density propellants without affecting the mechanical properties of the system (i.e., without lowering... 

TABLE 15.4 Binder Oxidation Conversion, Xp, versus Time for irinking Core Model... 

The majority of primers today are based on the synoxyd primer, first introduced in 1928. These utilize lead styphnate as the initiator, antimony sulfide as the fuel and frictionator (a substance that helps to efficiently pass on the energy from compression of the primer cap), and barium nitrate as the oxidizer. Other compounds that may also be present include calcium silicide, acting as a fuel and frictionator gum arabic, a fuel and binder oxidizers such as lead dioxide, lead nitrate, and lead hypo-phosphite ground glass or aluminum powder as frictionators tetrazene, a sensitizer and various other gums and resins as binders. 

The only question about their use is for applications above the binder oxidation temperature of 400 to 500°F (205 to 260°C). Most manufacturers rate their products above the binder temperature and are confident of their performance due to the long glass fiber matrix. However, there are certain applications that combine severe vibration with high temperature. In such cases, fiberglass products, like mineral wools, may tend to sag on the pipe and lose some of their thermal efficiency. 

Other Propellant Chemicals. In addition to the binder, oxidizer, and fuel, a solid propellant... 

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