Opening book details…
Can I read Effects of Tetraalkylaluminoxane Activators on Ethylene Polymerization Catalyzed by Iron-based Complexes on EtoBox?
Effects of Tetraalkylaluminoxane Activators on Ethylene Polymerization Catalyzed by Iron-based Complexes by Qi Wang; Lidong Li; Zhiqiang Fan is a Materials Science article available to read on EtoBox.
What is Effects of Tetraalkylaluminoxane Activators on Ethylene Polymerization Catalyzed by Iron-based Complexes about?
Five different tetraalkylaluminoxanes, tetraisobutylaluminoxane (A1), ethyltriisobutylaluminoxane (A2), diethyldiisobutylaluminoxane (A3), triethylisobutylaluminoxane (A4) and tetraethylaluminoxane (A5), were prepared to polymerize ethylene in the presence of iron complexes [((2,6-RPh)N@C(Me)) 2 C 5 H 3 N]FeCl 2 (R@Me, M1; R@iso-Pr, M2). Except M1/A1 and M2/A1, all other catalyst systems produced polyethylene with pronounced broad or bimodal molecular weight distribution (MWD). It was demonstrated that the low-MW fractions of these broad-or bimodal-MWD polyethylenes result from the chain transfer reaction to the alkylaluminium containing the Al-Et groups in the activator. As the Al/Fe ratio and the amount of the Al-Et groups in the activators increased in the order: A1 < A2 < A3 < A4 < A5, the polymerization activity and the low-MW fraction of broad-or bimodal-MWD polyethylene increased and the high-MW fraction correspondingly reduced.
Who reads Effects of Tetraalkylaluminoxane Activators on Ethylene Polymerization Catalyzed by Iron-based Complexes?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Qi Wang; Lidong Li; Zhiqiang Fan
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0014-3057)
- Published
- 2005
- Language
- EN
- Field
- Materials Science (Physical Sciences)