双[N,O]配体合镍配合物/甲基铝氧烷催化降冰片烯与苯乙烯的均聚和共聚

研究了新型双N,O]配体合镍配合物双水杨醛(对硝基苯)亚胺]合镍/甲基铝氧烷体系催化降冰片烯(NBE)和苯乙烯(St)的均聚和共聚的催化性能,考察了聚合温度、Al与Ni摩尔比对催化活性和均聚物相对分子质量的影响;考察了单体投料比对NBE和St共聚性能的影响。实验结果表明,NBE和St在较高温度(50℃)均聚时的催化活性分别为105g/(mol·h)和106g/(mol·0.5h);NBE与St共聚时的催化活性高达105g/(mol·h)。

Homo-and Co-Polymerization of Norbornene and Styrene with Novel Bis[N,O] Ligand Nickel Complex/Methylaluminoxane Catalyst

A novel nickel complex, bisN-(4-nitrophenyl)-salicylaldiminate] nickel was synthesized and used as catalyst in homo- and co-polymerization of both norbornene and styrene. The polymerization processes with bisN-(4-nitrophenyl)-salicylaldiminate] nickel/methylaluminoxane catalytic system was investigated. Effects of polymerization temperature and mole ratio of Al to Ni on both activity of the catalyst and weight-average relative molecular masses of obtained polymer were studied. Effect of monomer feed ratio on copolymerization of norbornene and styrene was investigated. At polymerization temperature of 50 ℃, catalytic activities of the catalyst in homopolymerizations of both norbornene and styrene can reach 105 g/(mol·h) and 106 g/(mol·0.5 h), respectively. The catalytic activity of the catalyst in copolymerization of norbornene and styrene is also up to 105 g/(mol·h).