Evidence of the Quasi‐Living Character of the  ansa ‐Zirconocene/MAO‐Catalyzed Copolymerization of Ethylene and Norbornene | Zendy

Jansen Johannes Carolus | Zendy; Mendichi Raniero | Zendy; Locatelli Paolo | Zendy; Tritto Incoronata | Zendy

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Evidence of the Quasi‐Living Character of the ansa ‐Zirconocene/MAO‐Catalyzed Copolymerization of Ethylene and Norbornene

Author(s) -

Jansen Johannes Carolus,

Mendichi Raniero,

Locatelli Paolo,

Tritto Incoronata

Publication year - 2001

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/1521-3927(20011101)22:17<1394::aid-marc1394>3.0.co;2-b

Subject(s) - norbornene , molar mass , copolymer , ethylene , polymer chemistry , dispersity , catalysis , polymerization , kinetics , polymer , materials science , chemistry , organic chemistry , physics , quantum mechanics

The kinetics of the ethylene‐norbornene copolymerization, catalyzed by rac ‐Et(Ind) 2 ZrCl 2 /MAO, 90% rac /10% meso ‐Et(4,7‐Me 2 Ind) 2 ZrCl 2 /MAO and rac ‐H 2 C(3‐ tert ‐BuInd) 2 ZrCl 2 /MAO was followed by sampling from the reaction mixture at fixed time intervals. Catalyst activity, copolymer composition and molar mass were studied as a function of time. The polymers showed an unusually low polydispersity and a significant increase in their molar mass with time, suggesting a quasi‐living polymerization.

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