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Formation of Ziegler‐type catalytic systems on the surface of multi‐walled carbon nanotubes for the production of composite materials by in situ polymerization
Author(s) -
Zdanovich Aleksandr A.,
Semikolenova Nina V.,
Kuznetsov Vladimir L.,
Matsko Mikhail A.,
Moseenkov Sergey I.,
Zakharov Vladimir A.
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48212
Subject(s) - carbon nanotube , polymerization , catalysis , materials science , polyethylene , composite number , polymer chemistry , ethylene , magnesium , in situ polymerization , titanium , chemical engineering , chemistry , composite material , organic chemistry , polymer , engineering , metallurgy
The peculiarity of formation of Ziegler‐type catalytic systems prepared using organoaluminum (AlR 3 ) and organomagnesium (MgR 2 ) on the surface of multi‐walled carbon nanotubes (MWCNTs) was revealed. We have found first AlR 3 and MgR 2 interact with different sites on MWCNT surface. It was demonstrated by IR spectroscopy that organoaluminum compounds were immobilized on the hydroxyl‐containing groups on MWCNT surface. Organomagnesium compounds were immobilized on the topological structural defects of MWCNTs; hydroxyl‐containing groups were not required for their immobilization. Further interaction between TiCl 4 and organomagnesium compound immobilized on the MWCNT surface yielded a catalyst containing titanium and magnesium chlorides (an analogue of the known titanium–magnesium catalysts), which exhibits an enhanced activity in ethylene polymerization. The effect of polymerization conditions on molecular weight characteristics of polyethylene in the MWCNT/PE composite material produced by in situ polymerization over the catalyst immobilized on the MWCNT surface was studied. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48212.