Presentation is loading. Please wait.

Presentation is loading. Please wait.

Evaluation of the Effect of Surface Area on DNAN Based Explosives NDIA Insensitive Munitions & Energetic Materials Technology Symposium 2013 IMEMTS 2013.

Published byHector Cain Modified over 8 years ago

Similar presentations

Presentation on theme: "Evaluation of the Effect of Surface Area on DNAN Based Explosives NDIA Insensitive Munitions & Energetic Materials Technology Symposium 2013 IMEMTS 2013."— Presentation transcript:

1 Evaluation of the Effect of Surface Area on DNAN Based Explosives NDIA Insensitive Munitions & Energetic Materials Technology Symposium 2013 IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]1 Matt Hathaway, Alberto Carrillo* BAE SYSTEMS OSI, Holston Army Ammunition Plant

2 Topics of Discussion DNAN Based Explosives Surface Area Measurements Analytical Analysis Brookfield Viscosity Pressing Study Shock Sensitivity (LSGT) Conclusions and Future Work IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]2

3 DNAN Based Explosives 2,4-dinitroanisole (DNAN) Melt ingredient used in insensitive formulations such as IMX-101 and IMX-104 Melting Point of 95°C Traditional Melt Pour Manufacturing Process Limited by viscosity of mixture Limits amount of high surface area ingredients in formulation Evidence that sensitivity is decreased with higher surface area Surface Area Study New process not limited by viscosity High and low surface area values Varied by ratio of coarse and fine ingredients IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]3

4 Surface Area Measurements – BET Brunauer-Emmett-Teller (BET) Theory Extension of Langmuir theory Explains the physical adsorption of gas molecules on a solid surface Gas molecules physically adsorb on a solid Gemini VII 2390a – Surface Area Analyzer Manufactured by Micromeritics Twin tube system which allows for accurate measurements of even low surface area materials Uses BET theory to determine surface area value IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]4

5 Surface Area Measurements - Results Each sample was run in duplicate Duplicate results were all plotted on same BET Transform plot and used to calculate SA Five pressure points used to generate linear section of BET Transform Plot Able to see difference in BET SA even with small changes in ingredient ratios IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]5 Sample ID1114-181114-201114-221114-24 1114-261114-281114-301114-321114-341114-361114-38 BET SA (m 2 /g) 1.56451.39621.29091.27611.01280.91510.82290.78500.55280.47810.3941 High Surface Area Low Surface Area

6 Analytical Analysis – Characterization Data IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]6 Batch ID 1114-181114-201114-221114-241114-261114-281114-301114-321114-341114-361114-38 Yield (%) 91.3384.2599.4095.5893.28100.2999.80100.0992.6998.4583.91 Composition Melting Point (ºC) 89.9390.1290.5889.8190.0290.3290.3690.7990.0690.1790.38 Exothermic Onset (ºC) 205212207216215208207206200201209 Bulk Density (g/cc) 1.041.061.021.030.96 0.950.96 0.991.00 Impact (cm) 195.7>200 155.5>200 Impact Standard (cm) 17.84 22.91 15.55 29.85 Friction (N) 204.0175.7210.4217.2216.0218.4277.7244.4205.6214.3210.6 Friction Standard (N) 129.1 180.9 164.5 145.8 Flowdex 2014181618 2624182014 Moisture (%) 0.0260.0190.0260.0300.0330.0440.0320.0390.0470.0350.040 VTS (ml/g) 0.140.110.210.110.170.130.110.081.250.08 Screens (% Pass) 4 94.296.894.299.297.493.691.686.896.595.899.7 8 54.156.514.646.845.925.422.226.344.549.874.5 12 42.125.92.51921.86.85.68.619.824.346.8 40 7.32.80.511.10.10.30.2 0.61 80 1.6 0.40.70.400.1 0.40.3 100 1.11.50.30.50.30000.10.30.1 200 0.40.20.1 00 00 325 0.100000 0000

7 Analytical Analysis – Granulation Similar granulation distribution regardless of surface area content Distributions are still very broad Further work is required to determine effect on granulation IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]7

8 Brookfield Viscosity Based on rotational shear using constant speed All samples tested at temperatures just above melting point 97°C – 99°C Trend observed in samples Higher surface area results in higher viscosity Not unexpected IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]8

9 Pressing Study I-Optimal DOE Varied pressure, mass, and surface area Indicates pressure is largest factor in controlling pressed density Higher pressure yields higher densities Little or no effect due to mass and surface area Used to determine pressing conditions for LSGT IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]9

10 Shock Sensitivity – LSGT Samples pressed at appropriate conditions to obtain a charge density of approximately 95% TMD Additional testing planned for late 2013 IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]10 Sample ID1114-181114-201114-221114-241114-261114-281114-301114-321114-341114-361114-38 Charge Density (%TMD)95 50% Point (card gap)138Pending 156Pending 175 Pressure (kbar)44.635.828.0 High Surface Area Low Surface Area

11 Conclusions and Future Work Several generic formulations successfully manufactured at varying surface area values Laboratory process independent of viscosity No significant differences in physical characteristics and processing Granulation can be controlled to obtain useable material Brookfield Viscosity Increases with increase in surface area value Correlation to efflux measurement LSGT Higher surface area resulted in lower sensitivity value 30+ card difference from low surface area sample Further tests planned for late 2013 IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]11

12 Acknowledgements Dr. Jeremy Headrick Ms. Kelly Guntrum Ms. Robyn Wilmoth Mr. Chris Long IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]12

13 Questions? IMEMTS 2013 San Diego, CA© BAE Systems (North America) 2013 BAE Systems [Non Export Controlled - Releasable to Foreign Persons S2DSEA2013-0502]13

Download ppt "Evaluation of the Effect of Surface Area on DNAN Based Explosives NDIA Insensitive Munitions & Energetic Materials Technology Symposium 2013 IMEMTS 2013."

Similar presentations

Laboratory Characterization of Municipal Solid Waste Incineration Ash Sita Marie Syal, Mohammad Kabalan, Matt Hambright, and Dr. Dimitrios Zekkos, P.E.

Laboratory Characterization of Municipal Solid Waste Incineration Ash Sita Marie Syal, Mohammad Kabalan, Matt Hambright, and Dr. Dimitrios Zekkos, P.E.
Wet Granulation Scale-up Experiments. Scale-up Approach with Dimensional Numbers 2 The effect of process parameter (i.e., impeller speed, liquid addition.

Wet Granulation Scale-up Experiments. Scale-up Approach with Dimensional Numbers 2 The effect of process parameter (i.e., impeller speed, liquid addition.
Zürich, 19.01.2006 Acceptable limits of degradation of TBC for high-efficient turbines (HET TBC) Department Materials (ALSTOM) Lab of Crystallography (ETH.

Zürich, Acceptable limits of degradation of TBC for high-efficient turbines (HET TBC) Department Materials (ALSTOM) Lab of Crystallography (ETH.
Capillary and Cone & Plate Viscometers

Capillary and Cone & Plate Viscometers
Viscosity SUNIL PRABHAKAR SR. No. 08458. Introduction Viscosity is a quantitative measure of a fluid’s resistance to flow. Dynamic (or Absolute) Viscosity:

Viscosity SUNIL PRABHAKAR SR. No Introduction Viscosity is a quantitative measure of a fluid’s resistance to flow. Dynamic (or Absolute) Viscosity:
Drying in the Pharmaceutical Industry1 DIT- Msc Pharmaceutical and Chemical Processes Technologies 28 th April 2009 Sara Baeza.

Drying in the Pharmaceutical Industry1 DIT- Msc Pharmaceutical and Chemical Processes Technologies 28 th April 2009 Sara Baeza.
Statistics: The Science of Learning from Data Data Collection Data Analysis Interpretation Prediction  Take Action W.E. Deming “The value of statistics.

Statistics: The Science of Learning from Data Data Collection Data Analysis Interpretation Prediction  Take Action W.E. Deming “The value of statistics.
M IND O VER M ATTER Explain p.73-79. E NTRY T ASK Begin a new header/thread in your notebook “Mind over matter” Write the Learning Target: I can explain.

M IND O VER M ATTER Explain p E NTRY T ASK Begin a new header/thread in your notebook “Mind over matter” Write the Learning Target: I can explain.
Kraft Pulping Modeling & Control 1 Control of Batch Kraft Digesters.

Kraft Pulping Modeling & Control 1 Control of Batch Kraft Digesters.
Lesson 5 CHANGE OF PHASE DISTINGUISH between intensive and extensive properties. DEFINE the following terms: – Saturation – Subcooled liquid – Superheated.

Lesson 5 CHANGE OF PHASE DISTINGUISH between intensive and extensive properties. DEFINE the following terms: – Saturation – Subcooled liquid – Superheated.
Topic 17: States of Matter Table of Contents Topic 17 Topic 17 Click box to view movie clip.

Topic 17: States of Matter Table of Contents Topic 17 Topic 17 Click box to view movie clip.
1 U N C L A S S I F I E D Modeling of Buoyant Plumes of Flammable Natural Gas John Hargreaves Analyst Safety Basis Technical Services Group LA-UR-12-21161.

1 U N C L A S S I F I E D Modeling of Buoyant Plumes of Flammable Natural Gas John Hargreaves Analyst Safety Basis Technical Services Group LA-UR
Lesson 21 Laminar and Turbulent Flow

Lesson 21 Laminar and Turbulent Flow
Chapter 1: Scientists’ Tools. Chemistry is an Experimental Science Common characteristics Although no one method, there are Careful observation s Accurate.

Chapter 1: Scientists’ Tools. Chemistry is an Experimental Science Common characteristics Although no one method, there are Careful observation s Accurate.
< BackNext >PreviewMain Chapter 2 Data in Science Preview Section 1 Tools and Models in ScienceTools and Models in Science Section 2 Organizing Your DataOrganizing.

< BackNext >PreviewMain Chapter 2 Data in Science Preview Section 1 Tools and Models in ScienceTools and Models in Science Section 2 Organizing Your DataOrganizing.
Agenda for today, 7-Mar.-12 Today’s Focus: Air Pressure CA Content Standard: 6.4.e Students know differences in air pressure, heat, air movement, and humidity.

Agenda for today, 7-Mar.-12 Today’s Focus: Air Pressure CA Content Standard: 6.4.e Students know differences in air pressure, heat, air movement, and humidity.
FUNDAMENTALS OF METAL FORMING

FUNDAMENTALS OF METAL FORMING
INNOVATIVE INTEGRATED METHODOLOGY FOR THE USE OF DECONTAMINATED RIVER SEDIMENTS IN ROAD CONSTRUCTION Progress Meeting September 10 th 2015 Prof. Ing. Massimo.

INNOVATIVE INTEGRATED METHODOLOGY FOR THE USE OF DECONTAMINATED RIVER SEDIMENTS IN ROAD CONSTRUCTION Progress Meeting September 10 th 2015 Prof. Ing. Massimo.
By Dr. Estee Yong Siek Ting

By Dr. Estee Yong Siek Ting
The Gas State  Gases are everywhere – atmosphere, environmental processes, industrial processes, bodily functions  Gases have unique properties from.

The Gas State  Gases are everywhere – atmosphere, environmental processes, industrial processes, bodily functions  Gases have unique properties from.

Similar presentations

Ads by Google