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New energetic thermoplastic elastomers for pressed explosive charges

: Holler, Marcel

Volltext urn:nbn:de:0011-n-3303148 (1.2 MByte PDF)
MD5 Fingerprint: bac0ff5a434f699b5cb179878a181194
Erstellt am: 10.3.2015

Fraunhofer-Institut für Chemische Technologie -ICT-, Pfinztal:
Energetic Materials. Particles, Processing, Applications : 45th International Annual Conference of ICT, June 24 - 27, 2014, Karlsruhe, Germany
Pfinztal: Fraunhofer ICT, 2014
Fraunhofer-Institut für Chemische Technologie (International Annual Conference) <45, 2014, Karlsruhe>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ICT ()

Four different energetic thermoplastic elastomers (ETPEs) from glycidyl azide polymer (GAP) and isocyanates with 2,2-bis(bromomethyl)propane-1,3-diol (DAP) as chain extender were synthesized. It was proven that DAP is a promising monomer in ETPE synthesis, offering the opportunity to get elastomers with tailored hard-block segments and thus specific mechanical properties. Two aromatic diisocyanates for polyaddition were explored and the properties of the different ETPEs compared. A broad variety of consistency, from sticky paste to rubbery flakes could be obtained. One specific ETPE was chosen and characterized by means of temperature-dependant viscosity. A PBX formulation based on HMX and TEX was developed, and two formulations, one with ETPE as energetic binder and another one with paraffin wax as inert binder were manufactured. Pressing of cylindrical compacts yielded explosive charges with > 97 % TMD. Characterization of explosive properties shows that PBX with ETPE binder has comparable detonation velocity but significantly increased detonation pressure compared to PBX with inert binder. Gap-test determined equal shock wave sensitivity of both PBX at 20.4 kbar GO / 17.2 kbar No-GO.