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Preparation, Thermal and Sensitivity Properties of Nano‐Sized Spherical Nitrocellulose Composite Crystal
Propellants, Explosives, Pyrotechnics ( IF 1.8 ) Pub Date : 2020-05-26 , DOI: 10.1002/prep.201900319
Xiangjun Meng 1 , Chengkai Pu 1 , Pengteng Cui 2 , Zhenggang Xiao 1
Affiliation  

The sensitivity study of propellants has been the concern of many researchers, and many achievements have been gained in this field. Nitrocellulose was replaced by some energetic thermoplastic elastomers to prepare insensitive high energy propellants, which is an effective method for reducing the sensitivity of propellants. However, the propellants based on these binders still have some defects. Preparation and application of insensitive nitrocellulose may overcome these drawbacks and becomes a potential candidate to be used as an ingredient of insensitive high energy propellants without energetic thermoplastic elastomers. To reduce the sensitivity of nitrocellulose, a nano‐sized spherical nitrocellulose composite crystal was prepared by pretreatment, degradation and nitration of microcrystalline cellulose. The products were characterized by TEM, FT‐IR, XRD, XPS, elemental analysis, TGA, DSC and sensitivity tests. Results show that the prepared nano‐sized cellulose is spherical with a diameter in the range of 15–30 nm and displays a composite crystal with two kinds of crystalline structure. The nano‐sized spherical nitrocellulose composite crystal has a higher crystallinity and nitrogen content and less impact sensitivity in comparison with the common nitrocellulose. The improvement of crystal quality of nitrocellulose using composite crystal method is beneficial for reducing the impact sensitivity of nitrocellulose.

中文翻译:

纳米球形硝化纤维素复合晶体的制备,热敏性能

推进剂的敏感性研究一直是许多研究者关注的领域,并在该领域取得了许多成就。硝化纤维素被一些高能的热塑性弹性体代替,以制备不敏感的高能推进剂,这是降低推进剂敏感性的有效方法。然而,基于这些粘合剂的推进剂仍具有一些缺陷。不敏感的硝化纤维素的制备和应用可以克服这些缺点,并成为不使用高能热塑性弹性体的不敏感高能推进剂成分的潜在候选者。为了降低硝化纤维素的敏感性,通过预处理,降解和硝化微晶纤维素制备了纳米球形球形硝化纤维素复合晶体。产品用TEM表征,FT-IR,XRD,XPS,元素分析,TGA,DSC和灵敏度测试。结果表明,所制备的纳米级纤维素是球形的,直径在15–30 nm范围内,并显示具有两种晶体结构的复合晶体。与普通硝化纤维素相比,纳米球形球形硝化纤维素复合晶体具有更高的结晶度和氮含量,并且冲击敏感性更低。采用复合结晶法提高硝化纤维素的结晶质量,有利于降低硝化纤维素的冲击敏感性。与普通硝化纤维素相比,纳米球形球形硝化纤维素复合晶体具有更高的结晶度和氮含量,并且冲击敏感性更低。采用复合晶体法提高硝化纤维素的晶体质量,有利于降低硝化纤维素的冲击敏感性。与普通硝化纤维素相比,纳米球形球形硝化纤维素复合晶体具有更高的结晶度和氮含量,并且冲击敏感性更低。采用复合晶体法提高硝化纤维素的晶体质量,有利于降低硝化纤维素的冲击敏感性。
更新日期:2020-05-26
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