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
- Sandia National Labs., Livermore, CA (United States)
- Mason Hanger Pantex Plant, Amarillo, TX (United States)
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.
- Research Organization:
- Sandia National Labs., Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10193081
- Report Number(s):
- SAND-94-8239; ON: DE95002492; BR: GB0103012
- Resource Relation:
- Other Information: PBD: Oct 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
A compatibility study of FEFO with various containment materials
Seepage control in contaminated and permeable Houston clay: A laboratory study
Related Subjects
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