Abstract A series of methyl-terminated and hydrogen-terminated hydrogen-containing silicone oil with different hydrogen content and chain length were synthesized by ring-opening polymerization design. Silicone rubber was prepared with hydrogen-containing silicone oil and vinyl-terminated silicone oil with a viscosity of 8033 mPa s. The silicone rubber was reinforced with vinyl MQ resin with a viscosity of 6223 mPa s and a vinyl content of 0.9%. Then the structure, thermal stability, viscosity of the synthesized hydrogenated silicone oil were characterized and the crosslinking density, mechanical properties, aging properties of the silicone rubber were analyzed. It was found that the mechanical properties of hydrogen-containing silicone oil with hydrogen content of 0.50% and chain length of 50% were the best. The parameters of silicone rubber were obtained as follows: viscosity 35.6 Pa s, tensile strength 5.05 MPa, elongation at break 339.01%, tear strength 7.23 kN/m, hardness 44°, compressive modulus 7.43 MPa. This provides an efficient method for designing high strength and low viscosity silicone rubber materials.

中文翻译：

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含氢硅油结构对硅橡胶性能的影响

摘要 通过开环聚合设计合成了一系列不同氢含量和链长的甲基和氢端含氢硅油。硅橡胶用含氢硅油和端乙烯基硅油制备，粘度为8033 mPa·s。硅橡胶用乙烯基MQ树脂增强，粘度为6223 mPa·s，乙烯基含量为0.9%。然后对合成的氢化硅油的结构、热稳定性、粘度进行了表征，并对硅橡胶的交联密度、力学性能、老化性能进行了分析。发现氢含量为0.50%、链长为50%的含氢硅油的力学性能最好。得到的硅橡胶参数如下：粘度35.6 Pa s，拉伸强度5.05 MPa，断裂伸长率339.01%，撕裂强度7.23 kN/m，硬度44°，压缩模量7.43 MPa。这为设计高强度、低粘度的硅橡胶材料提供了一种有效的方法。