Studies on energetic compounds based polymer composites for defence applications

Abstract

The present study deals with synthesis, characterization and kinetic parameters for thermal decomposition of polyester-based polyurethanes (PUs) as polymeric binder system using different curing agents for energetic composite. This study includes characterization and evaluation of metallized energetic composite from an energetic compound HMX and aluminium powder as filler reinforced with polyester-based PUs binder systems. Use of hydroxy terminated polybutadiene (HTPB)-based PUs binder system is prevalent in the manufacture of castable energetic composites and propellants. In comparison, polyester-based PUs have been paid limited attention in the literature. newlineThis study aims to explore suitable polymeric binder systems that exhibit compatibility with energetic molecules and metal powders, in addition to demonstrating high thermal stability, better performance, high mechanical properties, and structural integrity in energetic composites as compared to the conventional polymer binder system. This research explores different polyester-based PUs that have been cured with various curing agents, including MDI, IPDI, TDI and TMDI. Following appropriate characterization, these materials are used for their potential in the development of metallized energetic composites with specific desired properties for defence applications. Utilizing analytical and instrumental methods, this research characterizes the composites in terms of their physical, chemical, thermal, and mechanical properties. Additionally, the explosive properties, including impact and friction sensitivity, are analyzed to evaluate safety parameters. The research findings are presented in five chapters. newlineIn conclusion, it can be asserted that this research has effectively illustrated, for the first time, the application of polyester-based PUs as polymeric matrices for the development of various energetic reinforced polymer composites. Some of the resulting composites are considered to be promising alternatives to the traditional HTPB-based PUs polymer system. newline