共查询到20条相似文献,搜索用时 140 毫秒
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室内外试验结果证明,桶混助剂KAOADJUVANTA-134和KAOADJUVANTA-145分别对不同除草剂和杀虫剂具有显著的增效作用,平均可以减少农药使用量三分之一以上。同时,使用助剂后可显著提高耐雨水冲刷的能力。比较添加助剂前后各药剂润湿性能和渗透性能,发现添加这类桶混助剂能显著降低药剂的表面张力和界面张力,使药剂在叶面的铺展性和润湿性更好。添加助剂后,药剂在植物角质膜和气孔渗透方面的性能均显著增加。同时提高润湿性和渗透性是该系列助剂具有显著增效作用的主要原因。 相似文献
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研究了嵌段聚丙烯聚合工艺、乙烯含量对其基本性能的影响,冷热水管材专用助剂对嵌段聚丙烯性能的影响,研究表明:聚合工艺决定了嵌段聚丙烯的分子结构,乙烯含量对抗冲性能影响明显,助剂使嵌段聚丙烯的耐候性能、弯曲模量、抗冲击性能明显提高。 相似文献
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含氟"三防"纺织助剂是一种能明显改变织物的表面性能,使织物具有防水、防油、防污性能的助剂系列。综述了含氟"三防"纺织助剂的发展过程、研究现状,对该系列助剂的合成工艺进行了总结,并对该系列助剂国内发展进行展望。 相似文献
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新型气体发生剂用非叠氮化物可燃剂研究进展 总被引:1,自引:0,他引:1
气体发生剂广泛应用于航空、航天领域,在汽车安全气囊、灭火装置、救生系统等也有重要用途。简介烟火气体发生剂的组成、特点,重点介绍了新型气体发生剂用非叠氮化物类可燃剂CL-20,AZODN,BTATZ,PAK,TZX,FOX-7和离子型化合物等的研究及应用现状。认为研制高能量、低感度、大产气量、环保、廉价的可燃剂是气体发生剂的发展趋势。 相似文献
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In the course of the development of an oxidizer‐based extruded composite propellant for use as gas generant, a simple model to describe and evaluate the actual porosity using simple methods was developed. It is briefly described and used to assess the influence of porosity on the burn rate of propellants produced. For the formulation studied the presence of microporosities does not seem to significantly influence the burn rate. On the other hand, volume fraction of porosities in extruded composition grains can exert a large influence and can increase considerably under thermal treatment with a resulting augmentation in burn rate. 相似文献
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Philip W. Leonard David E. Chavez Philip F. Pagoria by X‐ray studies Damon L. Parrish 《Propellants, Explosives, Pyrotechnics》2011,36(3):233-239
The synthesis of (E)‐1,2‐bis(4‐(1H‐tetrazol‐5‐yl)‐1,2,5‐oxadiazol‐3‐yl)diazene (AzTF) and its high nitrogen salts is described. Compounds were tested for sensitivity to impact, spark, and friction and heats of formation were determined through bomb calorimetry. The calorimetry results coupled with density measurements by gas pychnometry were used to predict explosive output using the Cheetah thermochemical code. Of the four compounds tested AzTF itself has the most promise as an explosive due to TATB‐like performance and high thermal stability, while the triaminoguanidinium salt (TAG2AzTF) may find favor as a high‐nitrogen gas generant in regard to the low overall sensitivity and very high nitrogen content of the molecule. 相似文献
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BryceC. Tappan ArifN. Ali StevenF. Son ThomasB. Brill 《Propellants, Explosives, Pyrotechnics》2006,31(3):163-168
The high‐nitrogen compound triaminoguanidinium azotetrazolate (TAGzT) belongs to a class of C, H and N compounds that are free of both oxygen and metal, but retain energetic material properties as a result of their high heat of formation. Its decomposition thus lacks secondary oxidation reactions of carbon and hydrogen. The fact that TAGzT is over 80% nitrogen makes it potentially useful as a gas generant and energetic material with a low flame temperature to increase the impulse in gun or rocket propellants. The burning rate, laser ignition and flash pyrolysis (T‐jump/FTIR spectroscopy) characteristics were determined. It was found that TAGzT exhibits one of the fastest low‐pressure burning rates yet measured for an organic compound. Both the decomposition and ignition behavior of TAGzT are dominated by condensed phase reactions. T‐Jump/FTIR spectroscopy indicates that condensed phase reactions release about 65% of the energy, which helps to explain the high burning rate at low pressure. 相似文献
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