Physical and thermal impact of lead free ballistic modifiers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912115" target="_blank" >RIV/00216275:25310/18:39912115 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.tca.2018.02.002" target="_blank" >http://dx.doi.org/10.1016/j.tca.2018.02.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tca.2018.02.002" target="_blank" >10.1016/j.tca.2018.02.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Physical and thermal impact of lead free ballistic modifiers

Popis výsledku v původním jazyce

Preparation of solid propellants based on nitrocellulose was carried out. Modifications on the prepared propellants took place on the basis of environmental aspects. The effect of different ballistic modifiers (bismuth (III) citrate, bismuth sub nitrate and bismuth (III) oxide in comparison with lead oxide) on thermal decomposition behavior of nitrocellulose based propellants was studied. DTA and DSC thermal analysis were conducted to evaluate the performance of the modified propellants. Results from DTA and DSC were used to calculate the apparent activation energy. The relation between the obtained activation energy and the extent of conversion was investigated using DSC data treated with Friedman model. Thermal conductivity, bulk density and specific gravity were also measured to study the effect of burning rate modifier on physical properties of propellant. Results showed that the conventional propellant modifier lead oxide could be replaced by bismuth salts while maintaining the main thermal and physical properties of propellant without a significant shift in its thermal behavior.

Název v anglickém jazyce

Physical and thermal impact of lead free ballistic modifiers

Popis výsledku anglicky

Preparation of solid propellants based on nitrocellulose was carried out. Modifications on the prepared propellants took place on the basis of environmental aspects. The effect of different ballistic modifiers (bismuth (III) citrate, bismuth sub nitrate and bismuth (III) oxide in comparison with lead oxide) on thermal decomposition behavior of nitrocellulose based propellants was studied. DTA and DSC thermal analysis were conducted to evaluate the performance of the modified propellants. Results from DTA and DSC were used to calculate the apparent activation energy. The relation between the obtained activation energy and the extent of conversion was investigated using DSC data treated with Friedman model. Thermal conductivity, bulk density and specific gravity were also measured to study the effect of burning rate modifier on physical properties of propellant. Results showed that the conventional propellant modifier lead oxide could be replaced by bismuth salts while maintaining the main thermal and physical properties of propellant without a significant shift in its thermal behavior.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Thermochimica Acta

ISSN

0040-6031

e-ISSN

—

Svazek periodika

662

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

16-22

Kód UT WoS článku

000430029500003

EID výsledku v databázi Scopus

2-s2.0-85041907196