摘要
合成了新型限制几何构型四甲基环戊二烯金刚烷氨基二甲基钛配合物(1-Adamantyl)NSi Me2(C5Me4)]Ti Me2(c)。通过1H NMR、元素分析以及单晶衍射分析等技术手段确定了该配合物的结构。与其叔丁基氨配合物t Bu NSi Me2(C5Me4)]Ti Me2(a)对比,在修饰甲基铝氧烷(MMAO)/2,6-二叔丁基-4-甲基苯酚(BHT)活化下进行丙烯聚合,探讨了氨基配体结构及聚合条件对聚合性能的影响。在保持准活性聚合的条件下,金刚烷胺基配合物c的催化活性为562 kg(PP)/(mol(Ti)·h),为叔丁胺基配合物a的2倍以上,说明金刚烷胺的引入有助于提高体系的链增长速率。
(1-Adamantyl)NSiMe2(C5Me4)]TiMe2(c) was synthesized and characterized by elemental analysis, 1H NMR, and single-crystal X-ray analysis. Propylene polymerization was conducted with complex c using modified methyaluminoxane(MMAO)/butylated hydroxytoluene(BHT) as a cocatalyst to compare the polymerization activity of complex c with that of tert-butylamido complex(tBuNSiMe2(C5Me4)]TiMe2)(a). The c-heptane system shows an activity of 562 kg(PP)/(mol(Ti)·h) which is two times higher than that of a-heptane system indicating that the activity is improved by the introduction of 1-adamantyl substituent to the amido ligand.
出处
《应用化学》
CAS
CSCD
北大核心
2015年第9期1028-1032,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(21174026)
新世纪优秀人才支持计划资助
上海高校特聘教授(东方学者)岗位计划资助
上海市教育发展基金会"曙光计划"资助
中央高校基本科研业务费专项资金资助~~
关键词
限制几何构型
均相催化剂
丙烯聚合
constrained geometry catalyst
single-site catalyst
propylene polymerization