ABSTRACT Bis(2,2-dinitropropyl) acetal (BDNPA) and bis(2,2-dinitropropyl) formal (BDNPF) are two commonly used energetic plasticizers in explosive and propellant composites. However, some of their physical properties are rather scattered and inconsistent in the open literature. For example, there are at least two widely different values, 14.5ºC and −15ºC, for the melting point of eutectic BDNPA/F with 1:1 mass ratio (called NP here). The eutectic phase diagram of BDNPA/F mixtures are not well documented. Furthermore, the effect of temperature on the miscibility between water and eutectic BDNPA/F eutectic is rarely reported. To fill these knowledge gaps, a large set of BDNPA/F mixtures with BDNPA concentration ranging from 0 to 100% was analyzed using DSC techniques. In addition to confirming the eutectic melt point as −25.9ºC, a phase diagram of the BDNPA/F system was constructed from −30ºC to 45ºC. To study the miscibility between NP and water, a large set of NP/water samples with water concentration ranging from 500 ppm to 5800 ppm was fully characterized using coulometric Karl Fischer titration, TGA, DSC, and Near-IR Spectroscopy. As a result, a phase diagram of the NP and rich NP-water system was constructed from −90ºC to 130ºC. To further support these efforts, the effects of temperature on the NP viscosity, specific heat capacity, and thermal conductivity are reported here as well.

中文翻译：

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双(2,2-二硝基丙基)缩醛和双(2,2-二硝基丙基)缩醛的物理表征

摘要 双（2,2-二硝基丙基）缩醛（BDNPA）和双（2,2-二硝基丙基）缩甲醛（BDNPF）是炸药和推进剂复合材料中两种常用的高能增塑剂。然而，它们的一些物理特性在公开文献中相当分散和不一致。例如，质量比为 1:1 的共晶 BDNPA/F（此处称为 NP）的熔点至少有两个截然不同的值，14.5ºC 和 -15ºC。BDNPA/F 混合物的共晶相图没有很好的记录。此外，很少报道温度对水和共晶 BDNPA/F 共晶之间的混溶性的影响。为了填补这些知识空白，使用 DSC 技术分析了大量 BDNPA/F 混合物，其中 BDNPA 浓度范围为 0 到 100%。除了确认共晶熔点为 -25.9ºC，BDNPA/F 系统的相图是从 -30ºC 到 45ºC 构建的。为了研究 NP 与水之间的混溶性，使用库仑卡尔费休滴定、TGA、DSC 和近红外光谱对大量水浓度范围为 500 ppm 至 5800 ppm 的 NP/水样品进行了全面表征。结果，从-90ºC到130ºC构建了NP和富NP-水系统的相图。为了进一步支持这些努力，这里还报告了温度对 NP 粘度、比热容和热导率的影响。和近红外光谱。结果，从-90ºC到130ºC构建了NP和富NP-水系统的相图。为了进一步支持这些努力，这里还报告了温度对 NP 粘度、比热容和热导率的影响。和近红外光谱。结果，从-90ºC到130ºC构建了NP和富NP-水系统的相图。为了进一步支持这些努力，这里还报告了温度对 NP 粘度、比热容和热导率的影响。