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Studies on VOCl 3 /MgCl 2 /NaY/Al 2 Et 3 Cl 3 complex support catalysts for the copolymerization of ethylene and propylene
Author(s) -
Wang L.,
Feng L. X.,
Xu J. T.,
Yang S. L.
Publication year - 1994
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.1994.070541003
Subject(s) - copolymer , catalysis , ethylene , monomer , polymer chemistry , composition (language) , polymerization , sequence (biology) , materials science , polymer , chemistry , organic chemistry , composite material , linguistics , philosophy , biochemistry
Using VO 2+ as a spin probe, a new method to obtain microenvironmental information on supports was developed which can be used in the choice of supports for coordination catalysts. Utilizing the above method, NaY was chosen as second support component. A complex support catalyst VOCl 3 /MgCl 2 /NaY/Al 2 Et 3 Cl 3 was prepared and used in ethylene–propylene copolymerization. Higher polymerization activity was obtained with this catalytic system. Alternating the ratio of two kinds of supports, the composition and sequence structure of copolymers could be controlled, which showed that NaY participated in the active species, affected the insertion of monomer, and changed the composition and sequence structure of copolymers. © 1994 John Wiley & Sons, Inc.