Passivation of Ammonium Nitrate Surface for Use in Minol-2

Abstract

Prilled, spheroidized, and granular ammonium nitrate (AN) was coated with polychloro-p-xylylene (parylene C) by a vapor deposition polymerization technique. Particles of AN with a 0.2% coating remain free flowing after long exposure to ambient conditions. The effectiveness of the coating as a moisture barrier on the three forms of AN was found to be in the order, spheroids >prills >granules. Water adsorption isotherms and hygroscopicity determinations indicate that a 0.7% coating hydrophobes the surface of AN by approximately one order of magnitude. The parylene C/AN interface exhibits chemical and physical stability Minol-2 matrix, and tends to inhibit reactivity between AN and TNT. The thermal sensitivity of Minol-2 to initiation is unaffected by a 0.7% coating.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1972
Accession Number
AD0751129

Entities

People

  • Andrew F. Smetana
  • Thomas C. Castorina

Organizations

  • Picatinny Arsenal

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Ammonium Nitrate
  • Chemical Synthesis
  • Chemistry
  • Coatings
  • Explosions
  • Explosives
  • Fluids
  • Materials
  • Materials Processing
  • Materials Science
  • New Jersey
  • Nitrates
  • Particles
  • Rocket Oxidizers
  • Thermal Stability
  • Vapor Deposition
  • Water Vapor

Readers

  • Aerosol Science/Aerosol Physics
  • Rocket Propulsion.
  • Surface Engineering/Surface Coating Technology.