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Research on microscopic structure-activity relationship of AP particle-matrix interface in HTPB propellant

E-Polymers, ISSN: 1618-7229, Vol: 24, Issue: 1
2024
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Researchers from Rocket Force University of Engineering Publish Findings in Polymer Science (Research on microscopic structure-activity relationship of AP particle-matrix interface in HTPB propellant)

2024 OCT 28 (NewsRx) -- By a News Reporter-Staff News Editor at NewsRx Science Daily -- Investigators discuss new findings in polymer science. According to

Article Description

The matrix and particle interface of hydroxyl-terminated polybutadiene (HTPB) propellant is the weakest part of its mechanical properties, making it prone to dewetting damage and destroying the structural integrity of the propellant. This article uses nano-indentation, gas cluster ion beam etching, and X-ray photoelectron spectroscopy experimental analyses to study the physicochemical properties of the interface and subsequently construct a microscopic model for the HTPB matrix and ammonium perchlorate particle interface. The model fully considers the existing forms of curing agent toluene diisocyanate, bonding agent Tris (2-methyl-aziridine) phosphine oxide (MAPO), and the aging products of the propellant in the interface structure. Meanwhile, the physicochemical properties, mechanical properties, and adhesive properties of the interface under different tensile loading conditions were analyzed. The results indicate that the bonding agent MAPO significantly enhances the mechanical and adhesive properties of the interface. The interface is sensitive to changes in temperature and tensile rate, and the aged interface is more fragile.

Bibliographic Details

Zijie Zou; Hongfu Qiang; Xueren Wang; Junhong Zhou; Fengtao Zhang; Yiyi Li

Walter de Gruyter GmbH

Chemical Engineering; Chemistry; Materials Science

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