Neutral Polymeric Bonding Agents (NPBA) and Their Use in Smokeless Composite Rocket Propellants Based on HMXGAP- BuNENA

Author
Landsem, Eva
Jensen, Tomas Lunde
Hansen, Finn Knut
Unneberg, Erik
Kristensen, Tor Erik Holt
Date Issued
2012
Keywords
Rakettdrivstoffer
Polymere forbindelser
Permalink
http://hdl.handle.net/20.500.12242/813
https://publications.ffi.no/123456789/813
DOI
10.1002/prep.201100136
Collection
Articles
Description
Landsem, Eva; Jensen, Tomas Lunde; Hansen, Finn Knut; Unneberg, Erik; Kristensen, Tor Erik Holt. Neutral Polymeric Bonding Agents (NPBA) and Their Use in Smokeless Composite Rocket Propellants Based on HMXGAP- BuNENA. Propellants, explosives, pyrotechnics 2012 ;Volum 37.(5) s. 581-591
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Abstract
Very few efficient bonding agents for use in solid rocket propellants with nitramine filler materials and energetic binder systems are currently available. In this work, we report the synthesis, detailed characterization, and use of neutral polymeric bonding agents (NPBA) in isocyanate-cured and smokeless composite rocket propellants based on the nitramine octogen (HMX), the energetic binder glycidyl azide polymer (GAP), and the energetic plasticizer N-butyl-2-nitratoethylnitramine (BuNENA). These polymeric bonding agents clearly influenced the viscosity of the uncured propellant mixtures and provided significantly enhanced mechanical properties to the cured propellants, even at low NPBA concentrations (down to 0.001 wt-% of propellant). A modified NPBA more or less free of hydroxyl functionalities for interactions with isocyanate curing agent provided the same level of mechanical improvement as regular NPBA containing a substantial number of reactive hydroxyl groups. However, some degree of reactivity towards isocyanate is essential for function.
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