以七异丁基三硅醇POSS和三氯硅烷或三乙氧基硅烷化合物为原料,用“顶角-盖帽法”得到了一系列单官能POSS化合物。利用FT-IR、1 H-NMR、29SiNMR、DSC、XRD、TGA等对它们进行了结构表征和性能研究,并将这些化合物的特征红外吸收峰、核磁化学位移值、结晶性能、熔点、热降解行为与八异丁基POSS进行了比较,发现不同取代基团对POSS的物性有显著地影响,特别是惰性气氛下的热分解行为存在显著差异。 A series of monofunctional POSS compounds were obtained by using “apex-capping method” using heptaisobutyl trisilanol POSS and trichlorosilane or triethoxysilane compounds as raw materials. The structure and properties of these compounds were characterized by FT-IR, 1 H-NMR, 29Si NMR, DSC, XRD and TGA. The infrared spectra of these compounds were characterized by IR, NMR, DSC, Compared with octabutyl POSS, it was found that different substituent groups have a significant influence on the physical properties of POSS, especially the thermal decomposition behavior under inert atmosphere.