水杨醛亚胺镍/MMAO催化降冰片烯加成聚合

Addition Polymerization of Norbornene by Salicylaldimnato-nickel(Ⅱ) Complex

用水杨醛亚胺镍 / MMAO催化降冰片烯聚合获得了热稳定、高分子量、可溶性的加成聚合产物 . Al、Ni摩尔比、单体浓度、反应温度与时间对催化剂的活性和聚合物分子量均有较大影响 .在优化条件下 ,催化剂的活性达 1 3 t/ (mol· h) ,聚降冰片烯的粘均分子量达 1× 1 0 6.

The salicylaldimnato Ni(Ⅱ) complexes activated with modified methylaluminoxane(MMAO) as catalysts were employed in addition polymerization of norbornene to give soluble polymer with hight molecular weight. The catalytic activity, polymer yield, and molecular weight of polymer product were found significantly depended on the reaction condifions, such as n (Al)/ n (Ni) ratio, monomer concentration and polymerization reaction temperature and time. The catalyst activity of up to 1 3×10 7 g/(mol·h), and viscosity average molecular weight of polymer of up to 10 6 were obtained at optimum condition.