溶剂性质对六硝基六氮杂异伍兹烷晶型的作用

研究稳定地得到e型六硝基六氮杂异伍兹烷( HNIW)的结晶工艺条件,并寻求多晶转变的理论解释。研究发现,非溶剂的物理性质,如偶极矩、分子极性,在结晶过程中对于HNIW的晶型起重要作用。常温下在无晶种时,当利用乙酸乙酯、丙酮作为溶剂,采用偶极矩值小的非溶剂,如环己烷、石油醚、甲苯、异辛烷等均可使HNIW以ε型晶型结晶出来,反之,采用偶极矩值大的非溶剂,如三甘醇则使HNIW以其它晶型结晶出来。在较高温度下,s型HNIW在极性与非极性溶剂中稳定存在时间明显不同。     

Investigation on Hydrogenolysis of Hexabenzylhexaazaisowurtzitane

Hexabenzylhexaazaisowurtzitane (HBI W) is thefirst precursor of synthesizingthe high energy densitycaged nitramine 2 ,4 ,6 ,8 ,10 ,12-hexanitro-2 ,4 ,6 , 8 , 10 , 12-hexaazatetracyclo-[5 .5 .0 .05 ,9.03 ,11]-dodecane (HNI W)[1 -3]. HBI Witself is likely to beunstable in most solvents and easily to be decomposedeventhoughin weaker acid medium.Direct nitration-debenzylation of HBI Wis unlikely to be successfuldue to both competing nitration of phenyl rings andinstability of the ring system…     

聚合物/碳纳米管纳米复合材料性能研究进展

碳纳米管(CNT)可改善聚合物材料的诸多性能,是本世纪最有前景的改性剂之一.文中综述了近5年来,在聚合物/碳纳米管纳米复合材料(PCNC)多项性能(力学、电、热、阻燃、流变等)研究上取得的最新研究进展,讨论了材料中CNT的质量及含量、分散性、定向程度及表面化学改性(官能化)等因素与材料性能间的关系,还探讨了这类材料具有...     

有机酸催化合成2,4,6,8,10,12-六苄基-2,4,6,8,10,12-六氮杂异伍兹烷

研究了十几种有机酸对合成２,４,６,８,１０,１２ 六苄基 ２,４,６,８,１０,１２ 六氮杂异伍兹烷（Ⅰ）的催化作用,每种催化剂均取得了较好催化效果。尤其是水杨酸和对甲苯磺酸,可分别使化合物Ⅰ的产率达到７５％ 和８２％ ～８４％ 。随对甲苯磺酸用量的增大,化合物Ⅰ的产率先增大后减小。     

TADBIW制备HNIW中晶型转变过程的研究

四乙酰基二苄基六氮杂异伍兹烷（TADBIW）是制备六硝基六氮杂伍兹烷（HNIW）生产成本最低的硝解基质。本实验研究了由TADBIW制备HNIW时，HNIW晶型转变过程：硝解生成的是α-HNIW，后者在高温硝解系统中逐渐转变为．γ-HNIW，完成这种转变在70～75℃需3h，但晶体诱导体的加入能够加速这种转变。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

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.     

ANBDF的合成和稳定性研究

以3，5-二硝基苯甲酸为原料，经氨化、硝化和叠氮化热解脱氮成环三步反应合成出了7-氨基-6-硝基苯并二氧化呋咱(ANBDF)。ANBDF中含有氨基、硝基及苯并氧化呋咱环，这些基团与苯环处于同一平面，TGA和DSC分析均证明ANBDF是一热稳定性很高的高能炸药。