季铵化聚酰胺胺树状聚合物封装的RuRh双金属DENs催化聚(甲基氢硅氧烷)区域选择性改性研究

Studies on Regioselective Catalyzed Modification of Poly(methylhydrosiloxane) Using Quaternized Poly(amidoamine) Dendrimer-Encapsulated RuRh Bimetallic Nanoparticles

采用共络合法制备了部分季铵化的第五代聚酰胺胺树状聚合物封装的RuRh双金属纳米粒子(DENs)催化剂,分别利用紫外-可见光谱、光散射分析和透射电镜表征了该树状聚合物封装的RuRh双金属纳米粒子的形成、粒径及其分布.红外光谱和核磁共振谱分析表明,RuRh双金属DENs催化剂对聚(甲基氢硅氧烷)的硅氢化改性显示了较高的催化活性和良好的区域选择性.

Partially quaternized fifth-generation poly （amidoamine） nanoparticles（DENs） were prepared via CO-complexation method. and distribution of RuRh bimetallic nanoparticles were investigated dendrimer-encapsulated RuRh bimetallic The formation of DENs, the particle size by UV-Vis absorption spectroscopy, laser scattering analysis, and TEM. The results of FTIR and NMR spectroanalyses show that a high efficiency of regioselective hydrosilation modification of poly （methylhydrosiloxane） is achieved with the RuRh bimetallic DENs catalysts.