A new single-phased thermosetting resin (propargyloligosilazane, POSZ) was prepared through Hofmann alkylation of oligosilazane with propargylbromide; the propargyl content in POSZ was controlled by monitoring the amount of propargylbromide in synthesis. The characterizations showed that POSZ has ideal rheology during material processing, the thermal curing temperature could be lowered when isocyanate was used as crosslinking agent, and the thermally cured POSZ can be pyrolyzed into anti-oxidative ceramic at a high yield of >70%. For POSZ-matrixed carbon-fabric laminate composite, it possessed high mechanical properties and retained the original shape with the increase of temperature as high as 800 °C. The POSZ-matrixed laminate has the mechanical properties combining polymer character at room temperature and ceramic character at high temperature, and it will find many prospective high temperature applications in need of polymer and ceramic properties simultaneously.

中文翻译：

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炔丙基低聚硅氮烷基复合材料，用于结合聚合物和陶瓷性能的高温材料

通过低聚硅氮烷与炔丙基溴的霍夫曼烷基化制备了一种新型的单相热固性树脂（炔丙基低聚硅氮烷，POSZ）。通过监测合成中炔丙基溴的量来控制POSZ中炔丙基的含量。表征表明，POSZ在材料加工过程中具有理想的流变性，当使用异氰酸酯作为交联剂时，可以降低热固化温度，并且可以以> 70％的高收率将热固化的POSZ热解成抗氧化陶瓷。对于POSZ基碳纤维层压板复合材料，它具有较高的机械性能，并随着温度升高至800°C而保持原始形状。