Vinyl-containing titanium-silphenylene-siloxane oligomers (O1, O2, O3, and O4) with different molar ratios of titanium to silicon were successfully synthesized in high yields by nonhydrolytic sol-gel reaction, and the obtained four oligomers were further crosslinked with methylphenyl hydro-silicone oil (4) to form corresponding polymers (P1, P2, P3, and P4) by hydrosilylation reaction. Their structures were characterized with spectroscopic characterization techniques including FTIR, ¹H-NMR, and Raman spectroscopy. The effect of titanium element on crosslinking behavior, thermal resistance, refractive index, transparency, thermal aging stability, glass transition temperature, and surface properties of the polymers were studied. Compared with titanium-free polymer P1, the thermal resistance, refractive index, and thermal aging stability of titanium-silphenylene-siloxane polymers (P2, P3, and P4) were significantly improved. The titanium-silphenylene-siloxane polymers achieved a high refractive index (n = 1.580–1.584) and thermostability (T_5d > 500 °C). In thermal aging, the polymers exhibited superior performances with high optical transparency (~90% at 450 nm) and exhibited high thermal stability (~84% at 450 nm after thermal aging at 150 °C for 120 h). These data indicate that the polymers have potential application in optical materials such as LED encapsulants.

通过非水解溶胶-凝胶反应成功地高产率成功合成了钛与硅摩尔比不同的含乙烯基的钛-硅亚苯基-硅氧烷低聚物（O1，O2，O3和O4），并将得到的四种低聚物与甲基苯基进一步交联。氢硅油（4）通过氢化硅烷化反应形成相应的聚合物（P1，P2，P3和P4）。通过光谱表征技术（包括FTIR，^1）对它们的结构进行了表征1 H-NMR和拉曼光谱。研究了钛元素对聚合物的交联行为，耐热性，折射率，透明性，热老化稳定性，玻璃化转变温度和表面性能的影响。与无钛聚合物P1相比，钛-硅亚苯基硅氧烷聚合物（P2，P3和P4）的耐热性，折射率和热老化稳定性得到了显着改善。钛-硅亚苯基硅氧烷聚合物的折射率高（n = 1.580-1.584），热稳定性高（T _5d> 500°C）。在热老化中，聚合物表现出优异的性能，具有高的光学透明性（在450 nm处约为90％）和高的热稳定性（在150°C的温度下老化120 h后在450 nm处约为84％）。这些数据表明该聚合物在光学材料（例如LED密封剂）中具有潜在的应用。