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Title: The permeation of bis(2-fluoro-2,2-dinitroethyl) formal (FEFO), ethyl 4,4-dinitropentanoate (EDNP), ethyl 4-nitropentanoate (ENP), and 1,2,4-trichlorobenzene (TCB) through barrier membranes

Abstract

In support of the manufacture and storage of paste explosives, several membrane materials were evaluated as barriers to permeation. The permeation was quantified to evaluate leakage of the fluids from paste explosives during long-term storage. Four permeants were evaluated, though not every permeant was evaluated with every material. Mass uptake measurements were made during prolonged submersion of the materials in the permeants. Equilibrium amount absorbed and rate of absorption were used to calculate the diffusivity, and permeability of the given solvent/polymer pair. Permeabilities through membrane materials were judged using a cutoff of 10{sup {minus}10} mol s{sup {minus}1} m{sup {minus}1} above which permeation was unacceptably high. None of the materials tested was suitable for containing TCB at 125{degree}C. Additionally, PFA was unacceptable at 75{degree}C. Viton showed unacceptable permeation in ENP, but FEP and PFA were effective barriers for ENP. No significant differences were found in the permeabilities of different thicknesses of FEP and PFA with ENP. All of the materials (including the elastomer Kalrez) tested with both the explosive FEFO and the propellant EDNP were adequate barriers to their permeation. Polyethylene is unsuitable for contact with FEFO at elevated temperatures because of chemical reactions that occur with the polymer.

Authors:
; ;  [1];  [2]
  1. Sandia National Labs., Livermore, CA (United States)
  2. Mason Hanger Pantex Plant, Amarillo, TX (United States)
Publication Date:
Research Org.:
Sandia National Labs., Livermore, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10193081
Report Number(s):
SAND-94-8239
ON: DE95002492; BR: GB0103012
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Oct 1994
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; CHEMICAL EXPLOSIVES; DIFFUSION; PACKAGING; MEMBRANES; PERMEABILITY; 450100; 400201; 360606; CHEMICAL EXPLOSIONS AND EXPLOSIVES; CHEMICAL AND PHYSICOCHEMICAL PROPERTIES; PHYSICAL PROPERTIES

Citation Formats

Shepodd, T J, Daniel, A R, Buffleben, G M, and Foster, P. The permeation of bis(2-fluoro-2,2-dinitroethyl) formal (FEFO), ethyl 4,4-dinitropentanoate (EDNP), ethyl 4-nitropentanoate (ENP), and 1,2,4-trichlorobenzene (TCB) through barrier membranes. United States: N. p., 1994. Web.
Shepodd, T J, Daniel, A R, Buffleben, G M, & Foster, P. The permeation of bis(2-fluoro-2,2-dinitroethyl) formal (FEFO), ethyl 4,4-dinitropentanoate (EDNP), ethyl 4-nitropentanoate (ENP), and 1,2,4-trichlorobenzene (TCB) through barrier membranes. United States.
Shepodd, T J, Daniel, A R, Buffleben, G M, and Foster, P. Sat . "The permeation of bis(2-fluoro-2,2-dinitroethyl) formal (FEFO), ethyl 4,4-dinitropentanoate (EDNP), ethyl 4-nitropentanoate (ENP), and 1,2,4-trichlorobenzene (TCB) through barrier membranes". United States.
@article{osti_10193081,
title = {The permeation of bis(2-fluoro-2,2-dinitroethyl) formal (FEFO), ethyl 4,4-dinitropentanoate (EDNP), ethyl 4-nitropentanoate (ENP), and 1,2,4-trichlorobenzene (TCB) through barrier membranes},
author = {Shepodd, T J and Daniel, A R and Buffleben, G M and Foster, P},
abstractNote = {In support of the manufacture and storage of paste explosives, several membrane materials were evaluated as barriers to permeation. The permeation was quantified to evaluate leakage of the fluids from paste explosives during long-term storage. Four permeants were evaluated, though not every permeant was evaluated with every material. Mass uptake measurements were made during prolonged submersion of the materials in the permeants. Equilibrium amount absorbed and rate of absorption were used to calculate the diffusivity, and permeability of the given solvent/polymer pair. Permeabilities through membrane materials were judged using a cutoff of 10{sup {minus}10} mol s{sup {minus}1} m{sup {minus}1} above which permeation was unacceptably high. None of the materials tested was suitable for containing TCB at 125{degree}C. Additionally, PFA was unacceptable at 75{degree}C. Viton showed unacceptable permeation in ENP, but FEP and PFA were effective barriers for ENP. No significant differences were found in the permeabilities of different thicknesses of FEP and PFA with ENP. All of the materials (including the elastomer Kalrez) tested with both the explosive FEFO and the propellant EDNP were adequate barriers to their permeation. Polyethylene is unsuitable for contact with FEFO at elevated temperatures because of chemical reactions that occur with the polymer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {10}
}

Technical Report:
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