THE THERMAL-STABILITY OF THE POLYMORPHS OF HEXANITROHEXAAZAISOWURTZITANE .2.

被引：71

作者：

FOLTZ, MF

COON, CL

GARCIA, F

NICHOLS, AL

机构：

[1] Lawrence Livermore National Laboratory, Livermore, California

来源：

PROPELLANTS EXPLOSIVES PYROTECHNICS | 1994年 / 19卷 / 03期

关键词：

D O I：

10.1002/prep.19940190305

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Solid-solid phase transitions in the alpha, beta-, gamma-, and epsilon-polymorphs of 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (HNIW) have been studied as a function of temperature. Techniques employed include differential scanning calorimetry (DSC), differential thermal analysis/thermogravimetric analysis (DTA/TGA), and hot stage microscope analysis. Fourier transform infrared spectroscopy (FTIR) was used to identify results of polymorphic conversion. Results corroborate those((2)) of Part I that the existence of multiple a-hydrate phases complicates definition of the HNIW P-T phase diagram. A high temperature endothermic DSC response was determined by FTIR spectroscopy to be the beta --> gamma transition, not a conversion to a new high temperature ''delta'' phase. The role of water in the shifting this conversion to higher temperature is discussed.

引用

页码：133 / 144

页数：12

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