共聚法负载茂钛催化剂催化苯乙烯聚合的研究——Ⅰ催化剂的合成与表征

Synthesis and Characterization of the Polymer-supportedMetallocene Catalyst

通过将带有不饱和双键的茂化合物(对-(1-环戊二烯甲基)-苯乙烯)与苯乙烯、二乙烯基苯进行共聚,再与乙基锂反应,最后与钛酸四丁酯络合的方法合成负载茂钛催化剂.利用红外光谱(IR)、核磁共振谱(1HNMR)、元素分析和光电子能谱(XPS)对所得产物的结构进行了分析与表征.结果表明,所得负载催化剂主要为对位取代功能化载体催化剂,用等离子体发射光谱(ICP)测定金属Ti的含量为1.19%(质量分数),此催化剂可用于苯乙烯的定向聚合.

The polymer-supported metallocene catalyst was prepared by first copolymerization of metallocene with unsaturated double bond substituent styrene and divinyl benzene, and then reacted with ethyl lithium in toluene, finally complexed by tetrabutyl titanate. The catalyst structure was studied and characterized by IR, 1HNMR, ultimate analysis and photoelectron binding energy spectrum. The results showed that the supported titanium catalyst obtained from copolymerization was mainly p-substitutent functional suported tartalyst. The ICP spectrum indicated that the content of titanium was 1.19%.