Norbornene polymerization and copolymerization with ethylene by titanium complexes bearing pyridinium imide ligand

IF 1.6 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Transition Metal Chemistry Pub Date : 2022-11-08 DOI:10.1007/s11243-022-00517-4

Jinyan Tan, Na Zhang, Ling Wang, Liduo Chen, Cuiqin Li, Yan Jiang, Jun Wang

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Abstract

A novel titanium complex was synthesized and characterized, and its catalytic behavior for the homopolymerization of norbornene (NB) and copolymerization with ethylene (E) was investigated. After activation with tri-isobutyl aluminum (TIBA), the titanium complex showed good activity for both homopolymerization of norbornene (NB) and copolymerization with ethylene (E), and the effect of reaction conditions on the catalytic activity was investigated. The norbornene copolymer (PNB) and norbornene-ethylene polymer (NB-E) were also characterized by nuclear magnetic resonance (¹H NMR, ¹³C NMR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results showed that PNB is an addition polymerization product of norbornene, and the insertion ratio of NB in NB-E is 83.40%. The morphology of PNB is flaky, while the morphology of NB-E is a cross-linked network. The solubility of PNB and NB-E is poor, and they have a good thermal decomposition temperature of about 400 ℃.

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含吡啶亚胺配体的钛配合物对降冰片烯的聚合及与乙烯的共聚

合成了一种新型钛配合物并对其进行了表征，研究了其催化降冰片烯(NB)均聚及与乙烯(E)共聚的行为。钛配合物经三异丁基铝(TIBA)活化后，对降冰片烯(NB)的均聚合和乙烯(E)的共聚均表现出良好的活性，并考察了反应条件对催化活性的影响。用核磁共振(1H NMR, 13C NMR)、扫描电镜(SEM)和热重分析(TGA)对降冰片烯共聚物(PNB)和降冰片烯-乙烯聚合物(NB-E)进行了表征。结果表明，PNB是降冰片烯加成聚合产物，NB在NB- e中的插入率为83.40%。PNB的形貌呈片状，NB-E的形貌呈交联网状。PNB和NB-E的溶解度较差，热分解温度在400℃左右。

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来源期刊

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.