Exploring
<i>ortho</i>
‐(4,4′‐dimethoxybenzhydryl) substitution in iron ethylene polymerization catalysts: Co‐catalyst effects, thermal stability, and polymer molecular weight variations
作者:Tian Liu、Yanping Ma、Gregory Solan、Tongling Liang、Wen‐Hua Sun
DOI:10.1002/aoc.6259
日期:2021.7
group exhibited a very high activity of 1.11 × 107 g (PE) mol−1 (Fe) h−1 at 70°C/10 atm over a 30-min run time that remained high even after 60 min, an observation highlighting its appreciable catalyst lifetime and thermal stability. In addition, the polyethylene formed by this catalyst class displayed desirable characteristics such as high linearity and high molecular weight (Mw range: 5.17–7.62 × 105 g mol−1)
六种不同类型的 4,4'-二甲氧基二苯甲基取代的双(芳基亚氨基)吡啶-氯化铁 (II)络合物—[2-2,6-(( p -MeOPh) 2 CH) 2 -4-MeC 6 H 2 }N=CMe}-6-(ArN=CMe)C 5 H 3 N]FeCl 2 (Ar = 2,6-Me 2 C 6 H 3 ( Fe1 ), 2,6-Et 2 C 6 H 3 ( Fe2 ), 2,6 - i Pr 2 C 6 H 3 ( Fe3 ), 2,4,6-Me 3 C 6 H2 ( Fe4 )、2,6-Et 2 -4-MeC 6 H 2 ( Fe5 )、2,6-(( p -MeOPh) 2 CH) 2 -4-MeC 6 H 2 ( Fe6 )-被报道。Fe2和Fe3的分子结构强调了N,N,N - 螯合配体的不对称性质和邻位-(4,4'-二甲氧基二苯甲基) 基团的空间保护。当Fe1 - Fe6时,观察到乙烯聚合的催化活性范围用甲基铝氧烷