石油化工2019，Vol.48Issue(11)：1099-1104,6.DOI:10.3969/j.issn.1000-8144.2019.11.002
聚乙烯催化剂中四氢呋喃的配位状态
Coordinative state of tetrahydrofuran in polyethylene catalyst
摘要
Abstract
The coordinative state of tetrahydrofuran(THF) with Mg,Ti metal in polyethylene BCS catalyst system was quantitatively characterized by 13C solid nuclear magnetic resonance quantitative cross polarization(13C QCP/MAS NMR). The coordination configuration was speculated and the experimental conditions for QCP/MAS characterization were optimized. The results show that the suitable test conditions are as follows:the contact time of cross polarization dynamics curve is 300 μs,and magic angle spinning rate is 8 kHz. The determination of the molar ratio of THF to Ti and Mg will be helpful to construct the coordination model of BCS catalyst. The method of determining the coordination state of BCS catalyst by QCP/MAS NMR will keep the coordination configuration of the catalyst without special treatment of the sample,and it has a wide range of practical application value. By comparing and analyzing the coordination content of BCS catalysts treated with different alkyl aluminum compounds,the content of active sites formed after alkylation can be inferred before polymerization, which is expected to be used as indicators to predict the active sites and product of catalysts.关键词
聚乙烯/BCS催化剂/固体核磁共振/定量交叉极化/四氢呋喃Key words
polyethylene/BCS catalyst/solid-state NMR/quantitative cross polarization/tetrahydrofuran引用本文复制引用
殷杰,姜健准..聚乙烯催化剂中四氢呋喃的配位状态[J].石油化工,2019,48(11):1099-1104,6.基金项目
中国石油化工股份有限公司资助项目(G6001-17-ZS-0265). （G6001-17-ZS-0265）
