Surface coordination polymerization of ethylene by hydrozirconation- immobilized Metallocene
Surface coordination polymerization of ethylene by hydrozirconation- immobilized Metallocene
复制标题
氢化锆化固定茂金属表面配位聚合乙烯
DOI：
10.1002/marc.201400099
复制
发表时间：
2014
影响因子：
4.6
通讯作者：
Zhang Jidong
中科院分区：
文献类型：
--
作者：
Zheng Jun;Wang Yanhui;Ye Lin;Lin Yichao;Tang Tao;Zhang Jidong
在乙烯基封端的载体（硅片和纳米二氧化硅球）上进行锆氢化反应是一种有效的锆碳键固载茂锆催化剂的方法，可用于乙烯的表面配位聚合制备表面栓系聚乙烯（PE）。由锆氢化诱导的Zr-C σ键的形成提供了用于在基底上生长共价连接的PE层的引发剂前体。SEM、AFM和TEM结果表明，表面聚合反应是由锆氢化反应控制的。当硅晶片用乙烯基选择性官能化或应用乙烯基改性的纳米二氧化硅时，可以形成具有结晶PE涂层的表面图案或核壳结构。认为锆氢化反应合成茂锆引发剂是制备聚烯烃杂化材料的一条通用途径。
Hydrozirconation on vinyl‐terminated substrates (silicon wafer and nanosilica sphere) is employed as an efficient way for immobilization of zirconocene catalyst through ZrC bonds, which is applied in surface coordination ethylene polymerization producing surface‐tethered polyethylene (PE). The formation of ZrC σ bond induced by hydrozirconation provides an initiator precursor for growing a layer of PE covalently linked onto substrates. The results from SEM, AFM, and TEM show that the surface polymerization is controlled by hydrozirconation. Surface pattern or core–shell structure with crystalline PE coating can be formed, when silicon wafer is selectively functionalized with vinyl‐groups or vinyl‐modified nanosilica is applied. It is believed that hydrozirconation for the synthesis of zirconocene initiator can be a versatile route to prepare polyolefin hybrid materials.