Abstract Benzoxazinyl modified polyhedral oligomeric silsesquioxane (BZPOSS) is successfully synthesized and used to prepare nanocomposites with bisphenol A cyanate ester (BADCy). The DSC results showed that the curing peak temperature of BZPOSS/BADCy blend decrease significantly from 317.1 °C to 160.3 °C, suggesting the high catalytic activity of BZPOSS to the polymerization of cyanate ester. The SEM micrographs of poly(BZPOSS/BADCy) and Silicon element distribution maps given by EDS both indicated that BZPOSS disperses evenly in BADCy. Dielectric properties tests showed that the dielectric constant can be reduced by the introduction of BZPOSS, which is attributed to the nano-pores from the cage structure of POSS. When 15 wt% BZPOSS was added, the dielectric constant decreased to 2.01 and the dielectric loss was also only 0.0070 at 1 MHz. Meanwhile, DMA and TGA result showed that the thermal stability and heat resistance of poly(BZPOSS/BADCy) at high temperature decreased with increasing BZPOSS, which is due to the change of crosslinking structure of the copolymers. The influences of the crosslinking structure and the nano-porous organic-inorganic hybrid particles on the dielectric and thermal property of poly(BZPOSS/BADCy) were also discussed.

中文翻译：

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苯并嗪基改性多面体低聚倍半硅氧烷和氰酸酯的新型超低 k 纳米复合材料

摘要 苯并嗪基修饰的多面体低聚倍半硅氧烷（BZPOSS）被成功合成并用于制备含双酚A氰酸酯（BADCy）的纳米复合材料。DSC结果表明，BZPOSS/BADCy共混物的固化峰值温度从317.1℃显着降低到160.3℃，表明BZPOSS对氰酸酯聚合具有较高的催化活性。EDS给出的poly(BZPOSS/BADCy)的SEM显微照片和硅元素分布图均表明BZPOSS在BADCy中分散均匀。介电性能测试表明，BZPOSS 的引入可以降低介电常数，这归因于 POSS 笼状结构的纳米孔。当添加 15 wt% BZPOSS 时，介电常数降低至 2.01，1 MHz 下的介电损耗也仅为 0.0070。同时，DMA和TGA结果表明，聚(BZPOSS/BADCy)在高温下的热稳定性和耐热性随着BZPOSS的增加而降低，这是由于共聚物的交联结构发生了变化。还讨论了交联结构和纳米多孔有机-无机杂化颗粒对聚(BZPOSS/BADCy)介电和热性能的影响。