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1.
用动态力学分析(DMA)方法,研究了上种TATB基PBX及其粘结剂(氟聚物)的测量频率与玻璃化温度的关系。结果显示:在这四种氟聚物F2314、F2311、F2463、和F2603中,只有F2314存在明显的二次转变,这是由于F2314分子中具有较多的C-C1键所引起的。从测量频率与玻璃化温度之间的关系,得到PBX及春粘结剂的活化能数据。经比较发现:TATB基PBX中,极高填充量的TATB颗粒的存在会对粘结剂链段的构象运动产生明显的限制作用。  相似文献   

2.
两种氟聚合物在TATB晶体表面吸附的动力学模拟   总被引:6,自引:2,他引:4       下载免费PDF全文
采用Discover/Material Studio中的分子动力学(COMPASS力场、NVT)方法及smart minimizer结构优化方法,对两种氟聚合物在TATB不同晶面上吸附行为进行模拟和结构优化后发现:(1)二者相互作用时,TATB原子位置变化的大小次序为:(010)〉(100)〉(001);而氟聚合物的展开程度按以上次序增加。(2)TATB晶体对两种聚合物都是吸引的,可以用F2311及F2314来包覆TATB晶体;且F2314对TATB晶体的包覆效果要优于F2311。(3)TATB不同晶面吸附能力的大小次序为:(010)〉(001)〉(100)。  相似文献   

3.
FOX-7的表面能研究   总被引:4,自引:2,他引:2  
南海  王晓峰 《含能材料》2006,14(5):388-390
通过接触角、Young-Good-G irifalco-Fowke方程测定研究了FOX-7的表面能以及氟聚合物溶液对FOX-7的润湿性能。理论计算表明FOX-7的表面能及其与氟聚合物的界面作用力均与TATB相当,氟聚合物可对FOX-7、TATB形成良好的润湿与包覆,且对TATB效果略好于FOX-7;在界面间酸碱作用中,FOX-7分子的碱性作用较大,给电子能力强。实际包覆结果显示,氟聚合物对FOX-7、TATB的包覆性能基本属于同一水平。  相似文献   

4.
F2314/AS复合粘结剂与TATB界面作用的相关参数研究   总被引:1,自引:1,他引:0       下载免费PDF全文
为分析复合粘结剂的组成和配比对高聚物粘结炸药(PBX)界面作用的影响,基于不同理论模型,采用多个参数(参数A、β和有效体积分数φe)评估了氟树脂F2314/丙烯腈-苯乙烯共聚物(AS)复合材料与1,3,5-三氨基-2,4,6-三硝基苯(TATB)的界面作用。结果表明,F2314/AS复合粘结剂与TATB的界面作用与F2314和AS的相转变有关,随着温度升高呈现较大波动。TATB/F2314和TATB/AS复合材料的界面作用参数β值分别为0.969和0.840。20℃时炸药颗粒的有效体积分数φe和单个颗粒有效体积的相对值B随F2314含量增加而增加。随着F2314含量增加,PBX中TATB炸药颗粒和粘结剂的界面作用增强。  相似文献   

5.
TATB/氟聚物PBX力学性能的分子动力学模拟   总被引:4,自引:4,他引:0  
运用分子动力学(MD)方法,设计"吸附包覆"、"渗透添加"和"切割分面"三种模型,模拟计算了TATB与含氟聚合物(PVDF,PCTFE,F2311和F2314)二组分复合材料的力学性能.首次报导纯TATB晶体及其氟聚物PBX的弹性系数、模量和泊松比.发现添加少量氟聚物能有效改善TATB的力学性能;氟聚物沿TATB三个晶面粘结对TATB力学性能的改善效应为010>100>001;在295~495K温度范围内的模拟结果表明,随温度升高,TATB及其氟聚物PBX的刚性减小、弹性增强.  相似文献   

6.
为优选高聚物粘结剂,采用分子动力学方法,对HMX/TATB基含少量氟聚物的3组分PBX炸药进行了模拟研究.构建了具有比较意义的3组分模型,在同样条件下分别对HMX和TATB与氟聚物F2314、F2311、VitonA 和F2614的结合能进行了计算,并且对PBX体系总结合能进行了研究,分别求得了系列超分子体系结合能相对大小排序.结果表明,从粘结效果角度综合考虑,F2311可作为该PBX体系优选粘结剂.  相似文献   

7.
反相气相色谱法表征氟橡胶与黑索今酸/碱性质   总被引:1,自引:0,他引:1       下载免费PDF全文
采用反相气相色谱法(IGC)用8种探针分子对氟橡胶(F246c,F2313,F2314,F3214)和黑索今(RDX)进行表面自由能作用参数、酸性作用参数及碱性作用参数。结果表明:四种氟橡胶为碱性物质,黑索今为酸性物质,四种氟橡胶与黑索今之间可形成酸碱相互作用。  相似文献   

8.
为提高含氟聚合物F2314的导热性能,采用多壁碳纳米管(MWCNTs)对F2314进行改性。用密炼混合法制备了F2314/MWCNTs复合材料。研究了MWCNTs含量、温度对F2314/MWCNTs复合材料的导热系数的影响。建立了F2314/MWCNTs复合材料的导热模型。结果表明,F2314/MWCNTs复合材料的导热系数随MWCNTs含量增加而增大。当MWCNTs质量分数为30%时,30℃下F2314/MWCNTs复合材料的导热系数高达0.647 W·m~(-1)·K~(-1),比纯F2314的导热系数提高3.43倍。F2314/MWCNTs复合材料的导热性能对温度的依赖性与F2314的相态转变密切相关。随着温度增加,F2314/MWCNTs复合材料的导热系数先增加,然后在玻璃化转变温度附近达到最大值,接着逐渐降低。有效介质方法修正公式的计算结果与实验吻合较好,表明该公式可以较好地模拟F2314/MWCNTs复合材料的导热性能。  相似文献   

9.
DMA方法研究多壁碳纳米管/F2314复合材料的粘弹性能   总被引:1,自引:1,他引:0  
用熔融共混法制备了多壁碳纳米管(MWCNTs)/氟聚物(F2314)复合材料。用动态机械热分析(DMA)法考察了MWCNTs含量对复合材料粘弹性能(动态力学行为和三点弯曲蠕变性能)的影响。结果表明,随着MWCNTs含量的增加,MWCNTs/F2314复合材料的储能模量增加,玻璃化转变温度和损耗因子峰值(tanδmax)减小。MWCNTs的存在使得MWCNTs/F2314复合材料的蠕变应变和稳态蠕变速率减小。80℃/0.1 MPa下,当MWCNTs含量从2%增加到20%时,MWCNTs/F2314复合材料的蠕变应变和稳态蠕变速率分别减小87.6%和84.7%。Burger四元件模型可以模拟MWCNTs/F2314复合材料的蠕变行为,并获得蠕变曲线的本构方程。  相似文献   

10.
李敬明  郝莹  舒远杰  韦兴文 《含能材料》2004,12(Z1):317-319
对F2314氟树脂及以F2314为粘结剂的高聚物粘结炸药(PBX)进行了老化试验,老化前后检测了F2314的结晶度、贮存模量、损耗因子及以F2314为粘结剂的PBX的力学性能.结果表明F2314氟树脂在老化后结晶度升高,进而导致F2314在老化后贮存模量升高,损耗因子降低,以F2314为粘结剂的PBX在老化后其压缩强度和压缩模量也略有升高;但以F2314为粘结剂的PBX在老化后其拉伸强度和拉伸模量呈现下降的趋势,这也有可能是由于F2314结晶后其粘结性能变差导致界面作用减弱引起的.  相似文献   

11.
Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.  相似文献   

12.
The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS (geographical information system) data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.  相似文献   

13.
Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.  相似文献   

14.
By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux (kernel version 2.6.11 ) is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.  相似文献   

15.
By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.  相似文献   

16.
For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.  相似文献   

17.
The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.  相似文献   

18.
阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅(LTNR)的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明:一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。  相似文献   

19.
Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.  相似文献   

20.
An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD (computational fluid dynamics) and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.  相似文献   

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