Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Central European Journal of Energetic Materials

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Anisotropic Interfacial Adhesion between Fluoropolymers and RDX Single Crystal Faces

Liu Jiahui, Zhou Xiaoqing, Qian Wen, Gong Feiyan, Yang Zhijian, Li Hongzheng, Nie Fude

Central European Journal of Energetic Materials

2022

Vol. 19, no. 4

409--423

Interfacial interactions have an important influence on the properties of energetic materials. The anisotropy of interfacial adhesive strength between various 1,3,5-trinitro-1,3,5-triazinane (RDX) single crystal faces and a typical binder was studied in this work by experimental and theoretical investigations. An RDX single crystal was prepared and processed into three kinds of orientated crystal faces, including (002), (020) and (210). These crystal slices were used as substrates, and fluorinated polymer F2314 was used as a binder. The surfaces of the RDX slices were analyzed by X-ray photoelectron spectroscopy (XPS) and an atomic force microscope (AFM). The work of adhesion was obtained from direct tensile tests, using designed samples of the sandwich structure of RDX-F2314-RDX, with various RDX single crystal surfaces. The polarity component of the surface energy and the work of adhesion was obtained by Young’s equation and the Fowkes theory, based on surface contact angle tests. The results in this work indicated the anisotropy of the interfacial adhesion of F2314 on various RDX crystal faces.

Experimental Investigation of the Effect of Polymers and Crystalline Qualities on the Safety Performance of LLM-105-based PBXs under Dynamic Compression and Shear

Dai Xiaogan, He Songwei, Huang Xiaona, Yang Zhijian, Wen Yushi, Li Ming

Central European Journal of Energetic Materials

2020

Vol. 17, no. 2

201--222

In recent years, the safety of ammunition has been an issue that has received close attention. The determination of the factors that influence the ignition of various 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105)-based polymer bonded explosives (PBXs) under external stimuli is of great importance for the development of safe PBX formulations. In order to further understand such factors and response characteristics, dynamic compression and shear tests on PBXs containing fluorinated rubber, 1,1-diamino-2,2-dinitroethene (FOX-7), polyethylene wax (PEW), and high quality or rough LLM-105 were conducted. A high speed camera, SEM, and XPS imaging were used to examine the recovered samples, variations in the structures of LLM-105 based-PBXs, and the surface chemical composition after compression and shear. For a given sample the ignition threshold in a shear test was generally lower than that in a compression test. We have also determined the factors causing decomposition. The ignition mechanism under dynamic compression and shear were helpful for developing better PBX formulations.