Energetic Polymers | Emerging nanoscience Research Institute (EnRI
EnRI has successfully synthesized energetic polymer plasticizers namely; low molecular weight GAP and azido terminated GAP (GAP-A). These energetic polymer based plasticizers are structurally similar to binder matrix and resist the migration due to enhanced miscibility. Low molecular weight (Mw= 650 to 800 g/mole) GAP polymers have been
A study on the aliphatic energetic plasticizers containing nitrate
The aliphatic energetic plasticizers with three and four –CH between nitrate ester and nitramine were synthesized to obtain a plasticizer that is more stable than N-butyl-N-nitratoethyl nitramine (BuNENA) with two –CH Keywords Ethylamino butanol 1. Introduction
Investigation of the Compatibility of a Novel Copolymer Based on
Abstract Plasticizers were added to the polymeric networks to improve the performance of the composite solid propellants. Energetic plasticizers were used to increase the energy content, in addition to improving the glass transition temperature and mechanical properties. The compatibility between polymer and plasticizer is an important criterion for obtaining the best thermomechanical
A study on the aliphatic energetic plasticizers containing nitrate
First, amino alcohol compounds such as propylamino propanol (PAP) and ethylamino butanol (EAB) as a precursor of energetic plasticizer were synthesized. However, unlike in BuNENA synthesis,...
Thermodynamic Properties of Energetic Plasticizers: Experimental Vapor
In this work, experimental vapor pressures of the commonly used energetic plasticizers methyl-NENA, ethyl-NENA, and butyl-NENA were measured for the first time with a transpiration method. The p–T fitting equations and the corresponding molar enthalpies of phase transitions at 298.15 K are reported: the molar enthalpies of sublimation and vaporization of methyl-NENA were measured to be 104.5
- What are energetic plasticizers?
- Plasticizers are functional additives that have been widely utilized to enhance the mechanical properties and processing technology of explosive systems. However, due to the increasing demand for energetic formulations of explosives and propellants, traditional plasticizers are gradually being replaced by energetic plasticizers.
- Are energetic plasticizers a good choice for solid propellant formulations?
- In modern solid propellant formulations, conventional plasticizers are being gradually replaced by energetic plasticizers (EPs), which usually have various energetic groups (such as nitro, nitroamino, azido, etc.) in the molecules to enhance the energy performance. Thus, extensive efforts have been devoted to the design and synthesis of new EPs.
- Which molecular skeletons are used in energetic plasticizers?
- From the molecular design perspective, the combination of flexible molecular skeletons (such as alkanes, aliphatic ethers, and aliphatic ester chains) with energetic groups (such as nitro, nitrate, nitramine, and azido) is the general design rule for energetic plasticizers [18, 19].
- Which plasticizer reduces the energy content of a formulation?
- Inert plasticizers such as dioctyl phthalate (DOP), diethyl phthalate (DEP), dioctyl adipate (DOA) significantly reduce the energy content of the formulation. Energetic plasticizers contribute to the total energy of formulation in addition to modifying the processability and physical properties.
- Which reagent is used to introduce azido groups in energetic plasticizers?
- For azido groups, the introduction of azido groups in energetic plasticizers is to use -N 3 in nucleophilic reagent NaN 3 to replace halogen (-X) , trifluoromethane sulfonate (-OTf) , nitrate ester (-ONO 2) and other leaving groups.
- Are nitramine plasticizers a promising research direction?
- Among these, the introduction of a nitramine group into the azido plasticizer has shown significant improvements in oxygen balance, density, and sensitivity compatibility. This makes azidonitramine plasticizers a promising research direction in the development of energetic plasticizers.
