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68.1×10^3)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。
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 68.1×10^3).Scanning electron microscope(SEM)studies showed that the polymer products formed platelet clusters.
作者
梁姗姗
刘恒
胡雁鸣
张学全
LIANG Shanshan;LIU Heng;HU Yanming;ZHANG Xuequan(College of Material Science and Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials,Changchun 130022,China)
出处
《应用化学》
CAS
CSCD
北大核心
2019年第10期1128-1134,共7页
Chinese Journal of Applied Chemistry
基金
吉林省科技厅优秀青年基金项目(20190103122JH)项目资助~~
关键词
自负载
钒催化剂
聚烯烃
self-immobilization
vanadium precatalyst
polyolefin
