甲基苯基硅橡胶的制备及应用研究

Study on Preparation and Application of Methylphenyl Silicone Rubber

基于对甲基苯基二甲氧基硅烷水解机理、水解油裂解规律、杂质传递规律等的研究,开发了甲基苯基环硅氧烷新型制备技术,实现了环体纯度大于99.7%的批量制备;通过新型引发体系开发、聚合工艺与设备改进等研究工作,解决了甲基苯基硅氧烷竞聚率差别大、高黏度体系传质、传热等问题,实现了5%~40%甲基苯基链节摩尔分数的甲基苯基硅橡胶的批量化制备,且工艺稳定性高,质量一致性好。应用研究结果表明:不同配方的甲基苯基硅橡胶具有优异的阻尼、耐烧蚀、耐辐照等性能,部分产品在航空、航天等领域获得应用。

Based on the study of the dimethoxyethylphenylsilane hydrolysis mechanism,hydrolysis oil cleavage rule and impurity transport phenomenon,the new synthesis technologies for methylphenylcyclosiloxane were developed to manufacture batches of the monomers with purity more than 99. 7%. By developing new initiation system,together with polymerization processing and instrument improvement,problems such as giant difference in reactivity ratio between monomers as well as the mass and thermo transport in high viscosity system were solved. As a result,manufacture of methyl phenyl silicone rubber containings 5% ~ 40%( molar fraction) methyl phenyl silioxane units are realized with high process stability and uniform quality. The study of application indicates that the silicone rubbers which containing different methylphenylsilioxane units have the excellent damping capacity,ablation resistance or radiation resistance,some of which be applied in aviation,aerospace and other fields.