自负载吡啶双亚胺酸酯钒(Ⅲ)催化剂的合成及催化乙烯聚合

doi:10.11944/j.issn.1000-0518.2019.10.190171

摘要/Abstract

摘要：

合成了一系列自负载吡啶双亚胺酸酯钒(Ⅲ)催化剂(V(Ⅲ)),并通过傅里叶变换红外光谱仪(FTIR)、元素分析及核磁共振波谱仪(NMR)等技术手段对配合物进行了表征。在倍半乙基氯化铝(EASC)活化下,V(Ⅲ)催化剂对乙烯聚合表现出很高的催化活性(7.2~12.1 g/(mol·h·Pa)),且自负载基团的链长对催化剂的活性及所得聚合物的性质影响较小。同时,该类V催化剂催化乙烯与1-己烯共聚合性能良好,得到高相对分子质量(高达68.1×10³)的聚合物。所得聚合物经扫描电子显微镜(SEM)表征,其微观结构为片层叠加结构。

关键词: 自负载, 钒催化剂, 聚烯烃

Abstract:

A series of alkenyl-functionalized bis(imidate)pyridine vanadium V(Ⅲ) complexes was synthesized and used for olefin polymerization in a self-immobilization mode. All the complexes were well-characterized by Fourier transform infrared spectrometer(FTIR), elemental analysis and nuclear magnetic resonance spectroscopy(NMR). Being activated by ethylaluminum sesquichloride(EASC), the V(Ⅲ) complexes displayeded high activity in ethylene polymerization(7.2~12.1 g/(mol·h·Pa)). Additionally, the length of self-immobilized alkenyl chains showed a little influence on the catalytic activity of the precatalysts. These V(Ⅲ) complexes also exhibited high activity in initiating ethylene/1-hexene copolymerization, affordiong copolymer products with high molecular weight(up to 68.1×10³). Scanning electron microscope(SEM) studies showed that the polymer products formed platelet clusters.

Key words: self-immobilization, vanadium precatalyst, polyolefin

梁姗姗,刘恒,胡雁鸣,张学全. 自负载吡啶双亚胺酸酯钒(Ⅲ)催化剂的合成及催化乙烯聚合[J]. 应用化学, 2019, 36(10): 1128-1134.

LIANG Shanshan,LIU Heng,HU Yanming,ZHANG Xuequan. Self-immobilization of Alkenyl-Functionalized Bis(imidate)pyridine Vanadium(Ⅲ) Complexes for Ethylene Homo(co)polymerization[J]. Chinese Journal of Applied Chemistry, 2019, 36(10): 1128-1134.

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