A novel method was developed for constructing cross-linked Silsesquioxane, utilizing Q-type H-POSS as a precursor. The Piers-Rubinsztajn (P-R) like reaction of Q-type H-POSS was catalyzed by B(C₆F₅)₃, resulting in the production of a prepolymer containing partial Si-H. Upon heating at high temperature in air, the prepolymer transformed into an insoluble and infusible cross-linked polymer, named Cured poly(H-POSS). This polymer exhibited high thermostability, with a 5% weight loss temperature (T_5d) of 709 °C and a residue of 92% at 800 °C. Additionally, Cured poly(H-POSS) exhibited high transparency, with a transmittance of 90% in the 400-800 nm wavelength range, and favorable dielectric properties, with a dielectric constant (D_k) of 2.88 at 14 GHz.

中文翻译：

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通过 Q 型 H-POSS 的自聚反应获得具有高热稳定性和低介电常数的交联倍半氧烷


开发了一种以 Q 型 H-POSS 为前驱体构建交联倍半硅氧烷的新方法。Q型H-POSS的Piers-Rubinsztajn（P-R）样反应由B（C₆F₅）₃催化，产生含有部分Si-H的预聚物。在空气中高温加热后，预聚物转化为不溶性且不熔的交联聚合物，称为固化聚 （H-POSS）。这种聚合物表现出高热稳定性，5% 失重温度 （T_5d） 为 709 °C，在 800 °C 时残留量为 92%。 此外，固化聚 （H-POSS） 表现出高透明度，在 400-800 nm 波长范围内具有 90% 的透射率，以及良好的介电性能，在 14 GHz 时的介电常数 （DK_{） 为} 2.88。