Organosilicon materials with high capacity of organic-to-inorganic conversion at elevated temperature are always favorable in the field of high-temperature-resistant materials, flame retardant materials, chemical engineering and functional materials in electrical engineering. In this work, it was found out that the platinum-nitrogen catalytic system could obviously enhance the organic-to-inorganic conversion efficiency of silicone rubber (SiR) at elevated temperature. The residual rate of Pt/N/SiR (SiR containing 0.33 phr Karstedt's catalyst (Pt) and 2 phr nitrogenous silane (N)) at 1000 °C was significantly improved from 3.0% to 44.8% in comparison with SiR and its thermal stability was also enhanced. DLS, TEM and UV–vis absorption spectrometry revealed that the platinum in Karstedt's catalyst would aggregate at elevated temperature and deteriorate its catalytic activity for organic-to-inorganic conversion of SiR. And the addition of nitrogenous silane can efficiently inhibit the aggregation and retain the high catalytic efficiency of platinum. A thorough TG-FTIR study, together with SEM/EDX and XPS analyses suggested that the platinum-nitrogen system might suppress the intramolecular cyclic transition and enhance the radical coupling between polymer chains of SiR during thermal degradation, which resulted in the high capacity of organic-to-inorganic conversion of Pt/N/SiR at elevated temperature.

在高温下具有高有机-无机转化能力的有机硅材料在耐高温材料，阻燃材料，化学工程和电气工程中的功能材料领域中一直是有利的。在这项工作中，发现铂-氮催化体系可以在高温下显着提高硅橡胶（SiR）的有机-无机转化效率。与SiR相比，Pt / N / SiR（含0.33 phr卡斯泰特催化剂（Pt）和2 phr含氮硅烷（N）的SiR）在1000°C时的残留率从3.0％显着提高至44.8％。也增强了。DLS，TEM和紫外可见吸收光谱法表明，Karstedt'中的铂 的催化剂会在高温下聚集并降低其催化SiR有机-无机转化的催化活性。并且，含氮硅烷的添加可以有效地抑制聚集并保持铂的高催化效率。透彻的TG-FTIR研究以及SEM / EDX和XPS分析表明，铂-氮系统可能抑制分子内的环状过渡并在热降解过程中增强SiR聚合物链之间的自由基偶联，从而导致有机物的高容量高温下Pt / N / SiR的无机转化为无机。