Effective Performance Modifications for a Composite Rocket Propellant via Coagglomerates of Cyclic Nitramines

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F25%3A39922835" target="_blank" >RIV/00216275:25310/25:39922835 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1021/acsomega.5c01848" target="_blank" >https://doi.org/10.1021/acsomega.5c01848</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsomega.5c01848" target="_blank" >10.1021/acsomega.5c01848</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effective Performance Modifications for a Composite Rocket Propellant via Coagglomerates of Cyclic Nitramines

Popis výsledku v původním jazyce

The new combustion modifier cis-1,3,4,6-tetranitrooctahydroimidazo-[4,5-d]imidazole (BCHMX) was tested on an aluminum HMX/HTPB/AP propellant. Monitored were the changes in the propellant characteristics, when the 10, 20, and 30 wt % ammonium perchlorate (AP) were substituted by pure 1,3,5,7-tetranitro-1,3,5.7-tetrazocane (HMX), mechanical mixture HMX/BCHMX (PM), and coagglomerate of HMX/BCHMX (CACs), the latter two in a weight ratio of 8:1. By means of the powder X-ray diffraction and FTIR and Raman spectroscopies, it was confirmed that CACs are a mixture of cocrystal βHMX/BCHMX with excess β-HMX. The relationships were discovered between the burning rate of the prepared samples and the heat of combustion (Qc), ignition temperature, specific rate constant of thermal decomposition, impact sensitivity, hardness, and specific impulse. Correspondingly, relationships between Qc and ignition temperature, as well as the impact and friction sensitivities, were investigated. It was found that increasing the amount of CACs n the propellant reduces the pressure exponent, while pure HMX and PM have the opposite effect. The significantly positive effectof CACs on the burning rate, especially at 20 wt % substitution of AP by these microcrystals, is another noteworthy finding.

Název v anglickém jazyce

Effective Performance Modifications for a Composite Rocket Propellant via Coagglomerates of Cyclic Nitramines

Popis výsledku anglicky

The new combustion modifier cis-1,3,4,6-tetranitrooctahydroimidazo-[4,5-d]imidazole (BCHMX) was tested on an aluminum HMX/HTPB/AP propellant. Monitored were the changes in the propellant characteristics, when the 10, 20, and 30 wt % ammonium perchlorate (AP) were substituted by pure 1,3,5,7-tetranitro-1,3,5.7-tetrazocane (HMX), mechanical mixture HMX/BCHMX (PM), and coagglomerate of HMX/BCHMX (CACs), the latter two in a weight ratio of 8:1. By means of the powder X-ray diffraction and FTIR and Raman spectroscopies, it was confirmed that CACs are a mixture of cocrystal βHMX/BCHMX with excess β-HMX. The relationships were discovered between the burning rate of the prepared samples and the heat of combustion (Qc), ignition temperature, specific rate constant of thermal decomposition, impact sensitivity, hardness, and specific impulse. Correspondingly, relationships between Qc and ignition temperature, as well as the impact and friction sensitivities, were investigated. It was found that increasing the amount of CACs n the propellant reduces the pressure exponent, while pure HMX and PM have the opposite effect. The significantly positive effectof CACs on the burning rate, especially at 20 wt % substitution of AP by these microcrystals, is another noteworthy finding.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Omega

ISSN

2470-1343

e-ISSN

2470-1343

Svazek periodika

10

Číslo periodika v rámci svazku

27

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

29194-29208

Kód UT WoS článku

001498236600001

EID výsledku v databázi Scopus

2-s2.0-105006787162