The formation and polymerization behavior of Ni(II) α-diimine complexes using various aluminum activators
作者:Richard J Maldanis、John S Wood、A Chandrasekaran、Marvin D Rausch、James C.W Chien
DOI:10.1016/s0022-328x(01)01340-7
日期:2002.2
propylene polymerization in combination with different aluminum co-catalysts. The precatalysts used in the study were [ArNC(Nap)C(Nap)NAr]NiBr2 (Nap=1,8-naphthdiyl) (1, Ar=2,4,6-trimethylphenyl; 2, Ar=2-tBu phenyl; 3, Ar=2-iPr phenyl). These complexes were synthesized via a one-pot reaction where the ligand is formed via an acid catalyzed condensation followed by direct addition of nickel(II) bromide
已合成了几种Ni(II)α-二亚胺配合物,并与不同的铝助催化剂结合用于乙烯和丙烯的聚合反应。研究中使用的预催化剂为[ArNC(Nap)C(Nap)NAr] NiBr 2(Nap = 1,8-萘二基)(1,Ar = 2,4,6-三甲基苯基; 2,Ar = 2- t Bu苯基; 3,Ar = 2- iPr苯基)。这些配合物是通过一锅反应合成的,其中配体是通过酸催化的缩合反应,然后直接添加溴化镍(II)形成的。还通过两步法制备配合物,其中首先通过在适当的苯胺和醌之间缩合形成配体,然后使所得的配体与(1,2-二甲氧基乙烷)二溴化镍(II)反应。配合物1和2的X射线结构研究已经进行了。二乙基氯化铝(DEAC)和1,3-二氯-1,3-二异丁基二铝氧烷(DCDAO)与聚甲基铝氧烷(MAO)相比,与这些Ni(II)α-二亚胺络合物结合使用,对乙烯和丙烯聚合反应显示出更高的活性。还给出了所得聚合物的分子量以及它们各自的多分散度和T