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介绍了火药用黏合剂PNIMMO(端羟基聚3–硝酸酯甲基–3–甲基氧杂环丁烷)的相对分子质量及其分布测定的激光光散射法。该法以四氢呋喃为流动相,通过MZ–gel SD plus凝胶色谱柱、示差折光检测器与多角激光光散射仪联用,获得了样品的相对分子质量及其分布,并对谱图进行分析讨论。结果显示,激光光散射法不依赖于标样,可直接测定PNIMMO的相对分子质量及其分布,快速简便,结果可靠,对于PNIMMO合成工艺的改进和后处理方法的选择具有指导意义。
The relative molecular mass and distribution of gunpowder binder PNIMMO (hydroxyl terminated poly 3-nitrate methyl-3-methyloxetane) were described by laser light scattering. The method uses tetrahydrofuran as the mobile phase, and through the MZ-gel SD plus gel column, the refractive index detector and the multi-angle laser light scattering instrument are used to obtain the relative molecular mass and the distribution of the sample, and the analysis and discussion of the spectrum . The results show that the laser light scattering method is not dependent on the standard sample and can directly determine the relative molecular mass and distribution of PNIMMO. The method is rapid and simple, and the results are reliable. It is instructive for the improvement of PNIMMO synthesis process and the choice of post-processing method.