Abstract Dendritic poly(silylene arylacetylene) resins based on 1,3,5-triethynylbenzene were synthesized through Grignard reaction. The influences of the content of 1,3,5-triethynylbenzene on the properties of the resin including processability, mechanical properties, heat resistance and thermal stability are studied. Results show that dendritic poly(silylene arylacetylene) resins possess good processability and high mechanical properties while maintaining excellent heat-resistance and thermal stability. The viscosity of dendritic poly(silylene arylacetylene) resins at 90 °C are below 200 mPa·s, and the flexural modulus of the cured DPSA-43H resin is up to 12.65 GPa. The degradation temperatures at 5% weight loss and the residue yield at 800 °C of the cured resins in nitrogen are all above 700 °C and 93%, respectively.

中文翻译：

---

基于 1,3,5-三乙炔基苯的树枝状聚（亚甲硅烷基芳基乙炔）树脂

摘要 通过格氏反应合成了以1,3,5-三乙炔基苯为基体的树枝状聚亚硅烷芳基乙炔树脂。研究了1,3,5-三乙炔苯含量对树脂加工性能、力学性能、耐热性和热稳定性等性能的影响。结果表明，树枝状聚（亚甲硅烷基芳基乙炔）树脂具有良好的加工性能和较高的机械性能，同时保持优异的耐热性和热稳定性。树枝状聚亚甲硅烷基乙炔树脂在90℃下的粘度低于200 mPa·s，固化后的DPSA-43H树脂的弯曲模量高达12.65 GPa。固化树脂在氮气中 5% 失重时的降解温度和 800°C 下的残留物产率都分别高于 700°C 和 93%。