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Efficient Molecular Weight Control with Trialkylaluminum in Ethylene/Norbornene Copolymerization by [Ph~2~C(Flu)(3‐MeCp)]ZrCl~2~/Methylaluminoxane Catalyst by Tomoyuki Tada; Zhengguo Cai; Yuushou Nakayama; Takeshi Shiono is a Materials Science article available to read on EtoBox.
What is Efficient Molecular Weight Control with Trialkylaluminum in Ethylene/Norbornene Copolymerization by [Ph~2~C(Flu)(3‐MeCp)]ZrCl~2~/Methylaluminoxane Catalyst about?
## Abstract Ethylene/norbornene copolymerizations were conducted with [Ph~2~C(Flu)(3‐RCp)]ZrCl~2~ [R: Me (1) or Me~3~Si (2)], which give alternating EN copolymers. The activity of 1 in the absence of R~3~Al was approximately twice that of 2 and increased further upon addition of R~3~Al. Et~3~Al increased the activity most effectively, and the $\overline {M} \_{{\rm n}} $ of the produced polymer decreased from 100 000 to 25 000 g · mol^−1^. On the other hand, the $\overline {M} \_{{\rm n}} $ value increased upon addition of ^__i__^Bu~3~Al from 100 000 to 209 000 g · mol^−1^ accompanied by an ≈2.5‐fold increase of activity. Consequently, 1 was found to be one of the most promising complexes for the synthesis of alternating EN copolymers, of which $\overline {M} \_{{\rm n}} $ value was efficiently controlled by the kind and the amount of R~3~Al added. magnified image
Who reads Efficient Molecular Weight Control with Trialkylaluminum in Ethylene/Norbornene Copolymerization by [Ph~2~C(Flu)(3‐MeCp)]ZrCl~2~/Methylaluminoxane Catalyst?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Tomoyuki Tada; Zhengguo Cai; Yuushou Nakayama; Takeshi Shiono
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1022-1352)
- Published
- 2010
- Language
- EN
- Field
- Materials Science (Physical Sciences)