Polymer bulletin, ( ISI ), Volume (70), No (6), Year (2013-1) , Pages (1769-1780)

Title : ( Polymerization of propylene catalyzed by a-diimine nickel complexes/methylaluminoxane: catalytic behavior and polymer properties )

Authors: Hamid PourTaghi Zahed , Gholamhossein Zohuri ,

Citation: BibTeX | EndNote

Abstract a-Diimine nickel dibromide complexes of dibromo[N,N’-bis(2,6-diisopropylphenyl)- 2,3-butanediimine]nickel(II) (A) and dibromo[N,N’-(phenanthrene-9,10-diylidene)bis(2,6- diisopropylaniline)]nickel(II) (B) were synthesized under controlled conditions. The catalysts A, B and mixed of 1:1 weight ratio of them (C) were activated by methylaluminoxane and were used for propylene polymerization in a semi-batch reactor. In study of the catalytic systems behavior, activities, glass transition temperature (Tg) and viscosity average molecular weight (Mv) values related to the catalyst C were between those related to the catalysts A and B under same conditions. The highest and the lowest molecular weights of the obtained polymers were produced by the catalysts B and A which were about 80,000 and 70,000 (g/mol) under same conditions, respectively. The Tg of polypropylenes produced by the catalysts was about -34 _C. The resulting polymers had similar behavior with thylene-propylene copolymer which it could be due to formation of ethylene-type units in the polymer chain.

Keywords

, Nickel, based catalyst  Late transition metal  Polymerization  Polypropylene 
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1034423,
author = {PourTaghi Zahed, Hamid and Zohuri, Gholamhossein},
title = {Polymerization of propylene catalyzed by a-diimine nickel complexes/methylaluminoxane: catalytic behavior and polymer properties},
journal = {Polymer bulletin},
year = {2013},
volume = {70},
number = {6},
month = {January},
issn = {0170-0839},
pages = {1769--1780},
numpages = {11},
keywords = {Nickel-based catalyst  Late transition metal  Polymerization  Polypropylene  Chain-walking},
}

[Download]

%0 Journal Article
%T Polymerization of propylene catalyzed by a-diimine nickel complexes/methylaluminoxane: catalytic behavior and polymer properties
%A PourTaghi Zahed, Hamid
%A Zohuri, Gholamhossein
%J Polymer bulletin
%@ 0170-0839
%D 2013

[Download]