中文摘要：

经希夫碱缩合反应，制得水杨醛亚胺配体（1），其Na盐分别与TiCl4和CpTi-Cl3反应合成了新型希夫碱钛配合物{3，5-di-Br-2-（O）C6H2CHN[2（O）C6H4]}TiCl2（2）；{3，5-di-Br2-（O）C6H2CHN[2（O）C6H4]}[TiCl（C5H5）]（3）．以GC-MS，^1HNMR和元素分析对中间产物及配合物进行了表征．以Al（i—Bu）3为助催化剂，详细考察了聚合时间、温度、Al／Cat和MMA／Cat的摩尔比对催化MMA本体聚合的影响．两个催化体系的聚合转化率均可以达到62％左右．2/Al（i—Bu）3（A）催化体系在聚合条件MMA／Cat（摩尔比）=2000，Al／Cat（摩尔比）=20，T=60℃，t=15h下，Mη可以达到3．6×10^5，相对分子质量分布2．14；3／Al（i-Bu）3（B）催化体系在相同聚合条件下，Mη可以达到4．3×10^5，相对分子质量分布2．44．红外光谱分析表明，A，B两个催化体系所得的PMMA的间同含量分别为85％和86％左右．

英文摘要：

Substituted salieyladimine ligand （1） was prepared by sehiff base condensation, and its sodium salts reaeted with TiCl4 and CpTiCl3, giving the novel Titanium complexes 13,5-di-Br-2-（O） C6H2CHN [ 2 （O） C6H4] }TiCl2（2） ; {3,5-di-Br-2-（O）C6H2CHN[2（O）C6H4] J [TiCl （C5H5） ] （3） bearing Sehiff base ligands. All complexes were characterized by ^1HNMR and element analysis. In combination with Al（i-Bu）3, both 2/Al（i-Bu） 3 （A） and 3/Al（i-Bu） 3 （B） were aetive to initiate methyl methaerylate （MMA） polymerization. The influence of reaetion parameters sueh as Al/Cat molar ratio, MMA/Cat molar ratio, time and temperature on polymerization have been examined in detail. The polymerization conversion of A and B reached 62 %. Under the polymerization condition （MMA/Cat（molar ratio） = 2 000, Al/Cat（molar ratio） = 20, T = 60 ℃, t = 15 h） of A system, Mη and MWD of PMMA reached 3.6 × 10^5 and 2.14 respectively. Under the same polymerization condition, B system, Mη and MWD of PMMA reached 4.3 × 10^5 and 2.44, respectively. From IR analysis, the syndiotaetie content of PMMA obtained by A and B were about 85 % and 86 % respectively.