Accession Number : AD1034204

Title :   Attempted - to -Phase Conversion of Croconic Acid via Ball Milling

Descriptive Note : Technical Report,01 Aug 2016,01 May 2017

Corporate Author : US Army Research Laboratory, Weapons and Materials Research Directorate Aberdeen Proving Ground United States

Personal Author(s) : Dean, Steven W ; Pesce-Rodriguez,Rose A ; Ciezak-Jenkins,Jennifer A

Full Text :

Report Date : 18 May 2017

Pagination or Media Count : 16

Abstract : High-energy ball milling was used in an attempt to induce a high-pressure phase change in croconic acid (CA), which is being investigated as a potential novel energetic material. High-speed video of the milling process was analyzed to determine the peak pressures and impact durations experienced by the CA powder during milling. Differential scanning calorimetry was used to determine what effect varying the ball-to-sample mass ratio and milling time had on the energy content of the milled material. Results indicate the pressure achievable with currently available milling equipment is not sufficient to induce the desired alpha- to beta -phase change, and extended milling times may degrade the material.

Descriptors :   ball mills , chemical compounds , CYCLOPENTENES , high energy , stainless steel , dynamic pressure , heat transmission , molecular structure , reactive materials , tensile modulus , video cameras , decomposition , particle size , calorimetry , MATERIAL DEGRADATION PROCESSES

Subject Categories : Industrial Chemistry and Chemical Processing

Distribution Statement : APPROVED FOR PUBLIC RELEASE