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邻苯二甲酸Pb(Ⅱ)配合物纳米颗粒的合成及其燃烧催化性能研究 总被引:6,自引:0,他引:6
The nanoparticle Pb(Ⅱ)-Phtalate complex was synthesized by liquid dispersion deposition method using Pb(Ac)2·3H2O and potassium acid phthalate as the reactant. The nanoparticle complexes were characterized with TEM, XRD, TG, DSC and IR. The composition of the nanoparticle PbPht complex was determined by chemical and elemental analysis. The catalytic performance of nanoparticle complex on the combustion of RDX-CMDB propellant was investigated. The results showed the average particle size of complex were about 50 nm. The nanoparticle Pb(Ⅱ)-Phtalate complex can enhance burning-rate of propellant by 135%, and lower the pressure exponent by 74%. 相似文献
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研究了氟介质条件下,合成参数对前驱体黏度和无铝Beta分子筛晶化过程的影响.X射线衍射结果表明,高水硅比可降低前驱体的黏度,但抑制分子筛的晶化.当合成体系中加入成核促进剂(二氧化锗)和晶化促进剂(高氯酸根或磷酸根)后,即使水硅摩尔比高达20~30,在150℃水热合成4 d,仍可获得高结晶性、微米级球形或多面体形无铝Beta分子筛.热重和能谱分析结果表明,极少量高氯酸根和磷酸根可进入分子筛孔道,并影响模板剂四乙基铵根离子的热分解过程.氮气吸附-脱附、扫描电子显微镜、透射电子显微镜和选区电子衍射分析结果表明,所得无铝Beta分子筛具有多级孔结构,介孔尺寸在3.4~3.8 nm之间,由纳米晶体或纳米棒堆积而成. 相似文献
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以4-烷基环己基甲酸和4-溴-2,3-二氟苯酚为原料,经格氏、黄鸣龙还原、碘代、芳基硼酸化、Suzuki偶联、威廉姆逊和酯化等反应,合成24种侧向二氟取代联苯类液晶化合物,总收率4.2%~8.7%,产物的分子结构经核磁(1H NMR,13C NMR)、红外和质谱确认。 利用差示扫描量热仪(DSC)和偏光显微镜(POM)对目标化合物进行了液晶性能测试。 结果表明,烷基链的长度不仅影响化合物的熔点和清亮点,还影响液晶相态变化;端烯可以降低化合物的熔点(降低了3.7 ℃),提高清亮点(提高了24.8 ℃),拓宽向列相区间(由54.1 ℃拓宽到82.6 ℃);酯基的引入可以提高清亮点,有助于消除近晶相。 该系列化合物在垂直取向(VA)和平面转换(IPS)显示模式中具有潜在的应用前景。 相似文献
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分别以2-氰基-3-(4-(二苯胺)苯基)丙烯酸(TPA-1)、2-氰基-3-(5-(4-(二苯胺)苯基)-噻吩-2-基)丙烯酸(TPA-2)和2-氰基-3-(5’-(4-(二苯胺)苯乙烯基)-[2,2’-联噻吩]-5-基)丙烯酸(TPA-3)为配体合成了3个稀土配合物Nd(L)3·2H2O(L=TPA-1,TPA-2,TPA-3)。采用元素分析、核磁共振氢谱(1H NMR)、红外光谱(IR)对配合物的组成进行了确认。通过紫外-可见吸收光谱和荧光光谱的测定,研究了配体共轭链长度对配合物吸光和发光性能的影响。结果表明:配体共轭链长度的增加有效增大了配合物的摩尔吸光系数,拓宽了配合物的吸光范围。配合物固体粉末近红外发光测试表明,Nd(TPA-1)3·2H2O和Nd(TPA-2)3·2H2O在889,1063和1339 nm处有较强的发射峰,分别归属于Nd(III)4F3/2→4I9/2,4F3/2→4I11/2和4F3/2→4I13/2的特征跃迁。 相似文献
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Introduction 2,4,8,10-Tetranitro-2,4,8,10-tetraazaspiro[5,5]udecane- 3,9-dione is a typical cyclourea nitramine (Figure 1). Its crystal density is 1.91 gcm-3. The detonation velocity according to =1.90 gcm-3 is about 8670 ms-1. Its sensitivity to impact is better than that of cyclotrimethy- lenetrinitramine. So it is the potential high explosive. Its preparation,1-3 properties,1-3 hydrolytic behavior4 and electronic structure3 have been reported. In the present work, we report its kinetic pa… 相似文献
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Thermochemical Properties and Non-isothermal Decomposition Reaction Kinetics of N-Guanylurea Dinitramide (GUDN) 总被引:4,自引:0,他引:4
Introduction N-Guanylurea dinitramide (GUDN) is a new ener-getic oxidizer with higher energy and lower sensitivity. Its crystal density is 1.755 g·cm-3. The detonation velocity is about 8210 m·s-1. Its specific impulse and pressure exponent are 213.1 s and 0.73, respectively. It has the potential for possible use as an energy ingredient of propellants and explosives from the point of view of the above-mentioned high performance. Its preparation,1 properties2 and hygroscopocity2 have been … 相似文献