Glycidyl Azide Polymer-Based Polyurethane Vitrimers with Disulfide Chain Extenders

Glycidyl azide polymer (GAP) is an important type of energetic polymer and considered to be the most promising candidate for the polymeric binders for next generation of solid propellants. However,...

Analysis of glycidyl nitrate polymerization reaction

Poly(glycidyl nitrate) (PGN) is a high-energetic polymer whose properties are determined by the presence of an –ONO2 explosophoric group. PGN can be obtained by polymerization of glycidyl nitrate (GN) monomers. The preferred polymerization route is via the activated monomer mechanism, due to its two main advantages: narrow molecular mass distribution of the obtained polymer and ability to control the heat generated during the reaction. The study allowed the GN monomer to be obtained as a product of nitration of epichlorohydrin. A series of GN polymerization reactions was conducted under different conditions (temperature, time and reactant amounts). The analysis showed that the lower the catalyst to initiator ratio, the higher the molecular mass of the obtained polymer (PGN). A temperature between 0-10 °C is the optimum temperature for GN polymerization. The longer the GN polymerization time the higher the molecular mass of the PGN. The GN polymerization reaction was scaled up without affecting the molecular mass or other properties of the obtained polymers. The following tests were carried out to determine the basic properties of PGN: GPC, 1H NMR, FTIR, DSC, TG, calorific value, viscosity, sensitivity to friction and impact.

Fluorinated glycidyl azide polymers as potential energetic binders

A novel fluorinated GAP energetic polymer was synthesized through copolymerization and azidation reaction.

Optimum Conditions for the Formation of Glycidyl Nitrate from 1,3-Dinitroglycerin

One of the utilization of glycerol as byproduct of the biodiesel industry is to produce polyglycidyl nitrate, the most energetic polymer. The synthesize of polyglycidil nitrate from glycerol includes three steps: nitration, cyclization and polymerization. The aim of this study is to obtain the optimum conditions of cyclization. The cyclization was carried out in a 5 ml reactor and equipped with Hickman distillation head and nitrogen purge with the variables are mole ratio of sodium hydroxide/glycerol of 1/1 to 1.5/1, reaction temperature of 283.15 to 293.15 K and sodium hydroxide concentration of 15%. Each sample was analyzed by gas chromatography to determine the composition of products. The optimum conditions are temperature of 288.15 K and the mole ratio of sodium hydroxide /glycerol of 1.5.

Formulation and performance of functional sub-micro CL-20-based energetic polymer composite ink for direct-write assembly

Direct writing deposition of energetic materials has been an area of interest for fuzing applications, novel initiation/booster trains, and for studying small scale detonations.