聚合物载体-稀土金属络合物的研究——Ⅹ.聚[苯乙烯-甲基丙烯酸β(甲基亚硫酰基)乙酯]载体-三氯化钕络合物对丁二烯聚合的催化作用

STUDY ON POLYMER SUPPORTED RARE EARTH METAL COMPLEXES——X . POLY[STYRENE-2-(METHYL SULFINYL)ETHYL METHACRYLATE] SUPPORTED NEODYMIUM CHLORIDE COMPLEXES IN CATALYTIC POLYMERIZATION OF BUTADIENE

合成了聚[苯乙烯-甲基丙烯酸β(甲基亚硫酰基)乙酯]载体-三氯化公络合物(PSM·NdCl_3),以红外光谱,X-射线光电子能谱等方法对其作了表征。实验结果表明,PSM·NdCl_3是配键型聚合物戴体-稀土金属络合物;Nd离子在络合物中分布均匀;PSM·NdCl_3和不同烷基铝组成的体系对丁二烯聚合的活性差别很大;在PSM·NdCl_3分子中引入某种Lewis酸可以改善其催化活性,并探讨了催化活性中心的生成机理。

Poly[styrene-2-(methyl sulfinyl)ethyl methac-rylate] supported neodymium chloride (PSM·NdCl3) was synthesized and characterized by IR, XPS and SEM. The results indicated that thePSM·NdCl3 was the polymer supported rare earth metal complex with the coordinate bond. The distribution of the metal ion Nd3+ in PSM· NdCl3 was homogeneous. The activity of the systems formed from PSM · NdCl3 and variousaluminum alkyls was very different for the polymerization of butadiene. Some Lewis acids introduced into PSM · NdCl3 molecule could improve the activity of PSM ·NdCl3-Al(i-Bu)3 system.