THEORY OF DOUBLE BASE PROPELLANTS

Contents :• Introduction• Propellant Classification• Double Base (DB)• DB propellant Composition• Conclusion

Introduction

Propellant ????

Substance that is required to move an object.

Propellant Classification

• Solid Propellant• Liquid propellant• Composite propellant• High energy propellant etc…

Solid Propellant

Single Base Double Base (DB)

Etc..

DB Propellant

Propellants which are formed by the use of

Nitrocellulose (NC) that is gelatinized by nitro esters such as nitroglycerine (NG) etc….

DB are also known as Smokeless Propellants

Compositions of Some Of the DB Propellants

• NC-TMETN

NC 53.8TMETN 39.1TEGDN 7.0EC 0.1

Nitro-Azide

DB propellants containing azide polymers are termed as Nitro-azide propellants

Ingridents NC-NG-DEP NC-NG-GAPNC 37.5 37.5NG 50.0 50.0DEP 12.5 ---GAP ---- 12.5

Russian Cordite

Cordite mainly refers to smokeless.

NC 56.5NG 28.0DIETHYL PHTHALATE 4.5DINITROTOULENE 11.0

Cast Double Base

NC 47.0NG 37.7EHTYL CENTRALITE 1.0DIETHYL PHTHALATE 14.0CARBON BLACK 0.3

Composite

NC 21.0NG 13.0ETHYL CENTRALITE 1.0CARBON BLACK 9.0POTASSIUM PERCHLORATE 56.0

Extruded Ballistite

NC 51.50NG 43.0ETHYL CENTRALITE 1.0DIETHYL PHTHALATE 3.25CARBON BLACK 0.20POTASSIUM SULPHATE 1.25