Title : ( Zn‐assisted cooperative effect for copolymers made by heterodinuclear Fe−Ni catalyst )
Authors: Mostafa Khoshsefat , Abbas Dechal , S. Ahmadjo , M. M. Mortazavi , Gholamhossein Zohuri , J. B. P. Soares ,
Full TextAbstract
Abstract: Mononuclear Fe and Ni based catalysts (M1 and M2) in the form of single and dual catalytic systems were employed in the presence and absence of diethyl zinc (DEZ) for polymerization of ethylene. Besides, corresponding homo- (M3 and M4) and heterodinuclear catalysts (M7) along with the mononuclear analogues (M5 and M6) were used to explore the effect of adjacency of second metal center on the chain transfer efficiency. Totally, DEZ had stronger influence on the behavior of mono- and dinuclear Fe-based structures and corresponding thermal and microstructural properties of the PE samples than Ni complexes. In addition, a mechanism was proposed for M5 as the vinyl-terminated polymer chains augmented in the presence of DEZ. More interestingly, M7 not only showed a cooperative effect for production of a random copolymer containing short and long chain branches but also at low and high concentration of DEZ, a blocky copolymer was obtained through CCTP and CSP. All these were consistent on 13C NMR, DMTA, SSA and CEF results.
Keywords
, Zn-assisted, cooperative effect, copolymers, Fe-Ni catalyst
@article{paperid:1082013,
author = {Mostafa Khoshsefat and Abbas Dechal and S. Ahmadjo and M. M. Mortazavi and Zohuri, Gholamhossein and J. B. P. Soares},
title = {Zn‐assisted cooperative effect for copolymers made by heterodinuclear Fe−Ni catalyst},
journal = {ChemCatChem},
year = {2020},
volume = {12},
number = {22},
month = {September},
issn = {1867-3880},
pages = {5809--5818},
numpages = {9},
keywords = {Zn-assisted; cooperative effect; copolymers; Fe-Ni catalyst},
}
%0 Journal Article
%T Zn‐assisted cooperative effect for copolymers made by heterodinuclear Fe−Ni catalyst
%A Mostafa Khoshsefat
%A Abbas Dechal
%A S. Ahmadjo
%A M. M. Mortazavi
%A Zohuri, Gholamhossein
%A J. B. P. Soares
%J ChemCatChem
%@ 1867-3880
%D 2020
