Development of comprehensive two-dimensional liquid chromatography for investigating aging of plastic bonded explosives

Freye, Christopher Edward; Rosales, Christopher James; Thompson, Darla Graff; Brown, Geoffrey Wayne; Larson, Sheldon Arthur

doi:10.1016/j.chroma.2019.460580

Title: Development of comprehensive two-dimensional liquid chromatography for investigating aging of plastic bonded explosives

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Abstract

The feasibility of measuring the aging and degradation of PBX 9501 via online two dimensional liquid chromatography (LC × LC) is investigated, and a preliminary instrumental setup and method is developed. Plastic-Bonded eXplosive (PBX) 9501 is nominally composed of 94.9 wt% HMX, 2.5 wt% Estane® 5703 (poly (ester urethane)), 2.5 wt% BDNPA/F (nitroplasticizer), 0.1 wt% Irganox 1010 and PBNA (N-phenyl-naphthylamine) at low concentrations. When exposed to various environmental conditions, PBX 9501 will degrade through different pathways. Because PBX 9501 is composed of both low molecular weight compounds (BDNPA/F, Irganox 1010, PBNA, and potential degradation products) and high molecular weight compounds (Estane® 5703), analysis is normally performed via two independent analyses. Additionally, the low molecular weight species are analyzed via high pressure liquid chromatography (HPLC) and the high molecular weight species via size exclusion chromatography (SEC). While these individual techniques yield information about the aging of PBX 9501, the combination of HPLC and SEC (i.e. HPLC × SEC) can simplify and streamline the analyses while also providing additional chemical information. A simplified sample preparation method is proposed for LC × LC analysis. Various SEC columns and HPLC column selection, flow rate, and gradient ramps were investigated for their application of measuringmore »« less

Authors:

Freye, Christopher Edward ^[1]; Rosales, Christopher James ^[1]; Thompson, Darla Graff ^[1];

^[1]; Larson, Sheldon Arthur ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Mon Sep 30 00:00:00 EDT 2019

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1570650

Alternate Identifier(s):: OSTI ID: 1591697

Report Number(s):: LA-UR-19-25083
Journal ID: ISSN 0021-9673

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Chromatography

Additional Journal Information:: Journal Volume: 1611; Journal ID: ISSN 0021-9673

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Liquid chromatography; Comprehensive two-dimensional; PBX 9501; Explosives

Citation Formats


                    Freye, Christopher Edward, Rosales, Christopher James, Thompson, Darla Graff, Brown, Geoffrey Wayne, and Larson, Sheldon Arthur. Development of comprehensive two-dimensional liquid chromatography for investigating aging of plastic bonded explosives.  United States: N. p., 2019. 
Web.  doi:10.1016/j.chroma.2019.460580.

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                    Freye, Christopher Edward, Rosales, Christopher James, Thompson, Darla Graff, Brown, Geoffrey Wayne, & Larson, Sheldon Arthur. Development of comprehensive two-dimensional liquid chromatography for investigating aging of plastic bonded explosives.  United States.  https://doi.org/10.1016/j.chroma.2019.460580

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                    Freye, Christopher Edward, Rosales, Christopher James, Thompson, Darla Graff, Brown, Geoffrey Wayne, and Larson, Sheldon Arthur. Mon .  
"Development of comprehensive two-dimensional liquid chromatography for investigating aging of plastic bonded explosives".  United States.  https://doi.org/10.1016/j.chroma.2019.460580.  https://www.osti.gov/servlets/purl/1570650.

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@article{osti_1570650,

  title        = {Development of comprehensive two-dimensional liquid chromatography for investigating aging of plastic bonded explosives},

  author       = {Freye, Christopher Edward and Rosales, Christopher James and Thompson, Darla Graff and Brown, Geoffrey Wayne and Larson, Sheldon Arthur},

  abstractNote = {The feasibility of measuring the aging and degradation of PBX 9501 via online two dimensional liquid chromatography (LC × LC) is investigated, and a preliminary instrumental setup and method is developed. Plastic-Bonded eXplosive (PBX) 9501 is nominally composed of 94.9 wt% HMX, 2.5 wt% Estane® 5703 (poly (ester urethane)), 2.5 wt% BDNPA/F (nitroplasticizer), 0.1 wt% Irganox 1010 and PBNA (N-phenyl-naphthylamine) at low concentrations. When exposed to various environmental conditions, PBX 9501 will degrade through different pathways. Because PBX 9501 is composed of both low molecular weight compounds (BDNPA/F, Irganox 1010, PBNA, and potential degradation products) and high molecular weight compounds (Estane® 5703), analysis is normally performed via two independent analyses. Additionally, the low molecular weight species are analyzed via high pressure liquid chromatography (HPLC) and the high molecular weight species via size exclusion chromatography (SEC). While these individual techniques yield information about the aging of PBX 9501, the combination of HPLC and SEC (i.e. HPLC × SEC) can simplify and streamline the analyses while also providing additional chemical information. A simplified sample preparation method is proposed for LC × LC analysis. Various SEC columns and HPLC column selection, flow rate, and gradient ramps were investigated for their application of measuring aged PBX 9501. Lastly, two LC × LC separations of a library standard of PBX 9501 and a sample of aged PBX 9501 are compared.},

  doi          = {10.1016/j.chroma.2019.460580},

  journal      = {Journal of Chromatography},

  number       = ,

  volume       = 1611,

  place        = {United States},

  year         = {Mon Sep 30 00:00:00 EDT 2019},

  month        = {Mon Sep 30 00:00:00 EDT 2019}

}

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