Issue 6, 2014
From the journal:

Polymer Chemistry

Ethylene–4-methyl-1-pentene copolymers of complex chain architecture using α-diimine Ni(ii) catalysts: synthesis, 13C NMR assignment and understanding the chain-walking mechanism†

Simona Losio,*a   Giuseppe Leone,a   Fabio Bertini,a   Giovanni Ricci,a   Maria Carmela Sacchia  and  Antonella Caterina Boccia*a  

* Corresponding authors

a ISMAC, Via Bassini, 15, 20133 Milano, Italy
E-mail: s.losio@ismac.cnr.it, antonella.boccia@ismac.cnr.it
Fax: +39 0270636400
Tel: +39 0223699366

Abstract

Ethylene (E) and 4-methyl-1-pentene (4M1P) are copolymerized using an α-diimine Ni(II) catalyst with MAO (methylaluminoxane) or Et2AlCl (diethylaluminium chloride) as the cocatalyst. A series of copolymers with a 4M1P comonomer content ranging from 0.94 to 36.73 mol% are obtained. A detailed 13C NMR assignment is presented and this thorough analysis has opened up the first full description of this interesting family of copolymers. Manifold branched copolymers are obtained with no noticeable differences in the branching distribution by using MAO or Et2AlCl. The resonance assignments are correlated with the chain-walking mechanism: branching analysis shows that the total amount of 2,1 insertion of the comonomer, followed by backward migration of the nickel active species along the polymer chain, is higher than that of 1,2 inserted 4M1P.

Graphical abstract: Ethylene–4-methyl-1-pentene copolymers of complex chain architecture using α-diimine Ni(ii) catalysts: synthesis, 13C NMR assignment and understanding the chain-walking mechanism

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C3PY01508D
Article type
Paper
Submitted
28 Oct 2013
Accepted
20 Nov 2013
First published
29 Nov 2013

Polym. Chem., 2014,5, 2065-2075

Permissions

Request permissions

Ethylene–4-methyl-1-pentene copolymers of complex chain architecture using α-diimine Ni(II) catalysts: synthesis, 13C NMR assignment and understanding the chain-walking mechanism

S. Losio, G. Leone, F. Bertini, G. Ricci, M. C. Sacchi and A. C. Boccia, Polym. Chem., 2014, 5, 2065 DOI: 10.1039/C3PY01508D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements