Study of the Mechanism and Kinetic of Accelerated Aging of HTPB/AP Gas-generating Propellants

Kebritchi, Abbas; Chanaani, Ali; Kaykha, Yasin

Volume 20, Issue 2 (1-2026) مواد پرانرژی 2026, 20(2): 99-108 | Back to browse issues page

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Kebritchi A, Chanaani A, Kaykha Y. Study of the Mechanism and Kinetic of Accelerated Aging of HTPB/AP Gas-generating Propellants. مواد پرانرژی 2026; 20 (2) : 4
URL: http://isaem.ir/article-1-1537-en.html

Study of the Mechanism and Kinetic of Accelerated Aging of HTPB/AP Gas-generating Propellants

Abbas Kebritchi ^*

, Ali Chanaani

, Yasin Kaykha

, a.kebritchi@ippi.ac.ir

Abstract: (3 Views)

Gas-generating propellants play a crucial role in a wide range of applications such as airbags, launch systems, and fire suppression systems. Their aging severely affects the reliability and safety of the systems that use these propellants. In this paper, a Gas-generating propellant based on hydroxyl-terminated polybutadiene/ammonium perchlorate (HTPB/AP) was aged under accelerated thermal aging conditions at temperatures of 50, 60, and 70 °C for 120 days. Then, the effect of this process on the mechanical and ballistic properties of the propellant was investigated. The aging kinetics were investigated using various models and ultimately modeled with a selected model capable of describing the competitive nature of different aging mechanisms. Also, the aging activation energy was obtained using the Arrhenius equation based on the mechanical properties. The results of this study indicated that the mechanical properties of the Gas-generating propellant are significantly affected by aging. At the beginning of the aging period, the tensile strength and modulus decrease by 30% and increase again after a short period, while the elongation shows a reverse trend. The burning rate changes by about 2% on average during aging, which does not affect the ballistic performance of this propellant.

Article number: 4

Keywords: Aging, Gas-generating Propellant, Tensile Strength, Elongation, Modulus, Hardness, Burning Rate.

Full-Text [PDF 555 kb] (3 Downloads)

Type of Study: Research | Subject: پیشرانه
Published: 2026/01/25