阴离子开环聚合法合成聚硅氧烷的研究进展

Research Progress of Polysiloxane via Anionic Ring-Opening Polymerization

聚硅氧烷具有良好的分子链柔顺性、低玻璃化转变温度、低表面张力、低表面能、热稳定性和生物相容性等优异特性,已在电子电气、交通运输和医疗卫生等领域得到广泛应用。环硅氧烷的阴离子开环聚合是制备聚硅氧烷最常见的方法。从环硅氧烷开环聚合的热力学和动力学控制途径出发,介绍了阴离子开环聚合机理,综述了近年来采用环硅氧烷平衡和非平衡阴离子开环聚合法合成聚硅氧烷的研究进展。

Polysiloxanes are widely used in electronic and electrical industries, transportation and healthcare owing to their excellent properties, such as good molecular chain flexibility, low glass transition temperature, low surface tension, low surface energy, thermal stability and biocompatibility. Anionic ring-opening polymerization of cyclosiloxanes is the most common method for the synthesis of polysiloxanes. Based on thermodynamically and kinetically controlled ring-opening polymerization of cyclosiloxane, the mechanism of anionic ring-opening polymerization is presented, and the recent progress on equilibrium and non-equilibrium anionic ring-opening polymerization of cyclosiloxane are reviewed.