Journal of Energetic Materials
Iranian Scientific Association of Energetic Materials
Tue, May 20, 2025
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Volume 19, Issue 2 (8-2024)
مواد پرانرژی 2024, 19(2): 93-99 |
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Norouzi M, Kozegary S G, Fallahzade R, Saboor M. تأثیر فرآیند نورد بر پایداری شیمیایی، ریز ساختار و خواص فیزیکی و مکانیکی پیشرانه جامد دوپایه حلالی. مواد پرانرژی 2024; 19 (2) : 4
URL: http://isaem.ir/article-1-1518-en.html
URL: http://isaem.ir/article-1-1518-en.html
, mahdinorouzi58@yahoo.com
Abstract: (331 Views)
The chemical stability, glass transition temperature, mechanical properties, and physical structure of solid propellants are important for optimal engine performance. In this research, the effect of rolling process on these properties of solid propellants was investigated. Samples of double base solid propellant prepared by the solvent method, were rolled for 2, 4, 6, and 8 minutes using a roller machine. Rolled samples were analyzed at different times using Bergman-Young tests, permeation gel chromatography, tensile test, differential scanning calorimetry, and computerized micro-scaning. The results of the Bergman-Young test showed that the propellant has optimal stability during the rolling time of about three minutes. The permeation gel chromatography test showed that with increasing the rolling time from 2 to 8 minutes, an increase in the numerical molecular weight and a decrease in the molecular weight of the weight were observed, indicating the failure of the large Nitrocellulose (NC) polymer chains. The results of the computerized micro-sectioning test showed that with the increase of the rolling time from 2 to 8 minutes, the percentage of holes decreased from 10.02% to below 0.82%, and the average value of the radius of holes decreased from 40.2 to below 4 microns. . The results of differential calorimetry test showed that by increasing the rolling time from 2 to 8 minutes, the glass transition temperature decreased from -46.08 to -48.02ºC. The results of the mechanical properties test showed that by increasing the rolling time from 2 to 8 minutes; Tensile Strength (TS) and Elongation (EL) have increased from 5.36 to 9.40 and 4.78 to 13.00, respectively.
Article number: 4
Keywords: Double-Base Solid Propellant, Rolling Process, Chemical stability, Pore, Glass Transition Temperature, Mechanical properties
Type of Study: Research |
Subject:
سنتز، آناليز، کنترل کيفيت، فرمولاسيون و فرايندهاي توليد مواد پرانرژی (منفجره، پيروتکنيک و پيشرانه)
Published: 2025/02/2
Published: 2025/02/2
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