新型树枝状镍系催化剂的合成、表征及催化乙烯聚合的性能  

Synthesis and characterization of novel dendrimer-based nickel catalyst for ethylene polymerization

作　　者：施伟光[1] 杨光[1] 王斯晗 李翠勤[1] 王俊[1] 

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江大庆163318 [2]中国石油大庆化工研究中心,黑龙江大庆163318

出　　处：《化工进展》2014年第7期1763-1768,共6页Chemical Industry and Engineering Progress

摘　　要：合成了一种含有强供电子、较大空间位阻的新型树枝状水杨醛亚胺配体及其镍配合物,利用1H NMR、元素分析、FT-IR、UV进行了表征。以配合物为催化剂,甲基铝氧烷（MAO）为助催化剂对乙烯齐聚反应进行了研究,详细考察了聚合反应温度、Al/Ni摩尔比、反应压力及时间对催化剂活性及产物分布的影响。结果表明,齐聚产物为不同碳链的烯烃,在温度为25℃、Al/Ni=500、压力为0.5MPa、时间为0.5h的条件下,树枝状催化剂的活性最高,达到4.93？105g/（mol Ni·h）,C10～C18的含量为54.17%。A new tert-butyl-substituted dendrimer compound and its corresponding Ni（Ⅱ） complex were synthesized and characterized with 1H NMR,elemental analysis,FT-IR,UV. The nickel complex activated by methylaluminoxane（MAO） was tested in oligomerization of ethylene. The effects of Al/Ni molar ratio and polymerization temperature on catalyst activity and product distribution were also investigated. The products were olefines with different carbon chains,catalytic activity reached a maximum value 4.93×105g/（mol Ni·h） at reaction time of 30min,reaction pressure of 0.5MPa,reaction temperature of 25℃ and Al/Ni ratio 500 for the tert-butyl-substituted nickel complex,and C10—C18were 54.17%.

关 键 词：树枝状大分子 水杨醛亚胺配体 镍配合物 乙烯齐聚 

分 类 号：O643.3[理学—物理化学]