| Publication Type |
Journal Article |
| Title |
HOMO AND COPOLYMERIZATION OF ETHYLENE - IMPROVEMENT OF SUPPORTED VANADIUM CATALYSTS PERFORMANCE BY HALOCARBONS |
| Authors |
M R Ribeiro A Deffieux M Fontanille MF Portela |
| Groups |
CATHPRO |
| Journal |
MACROMOLECULAR CHEMISTRY AND PHYSICS |
| Year |
1995 |
| Month |
November |
| Volume |
196 |
| Number |
11 |
| Pages |
3833-3844 |
| Abstract |
The effect and the role of halogenated molecules as additives for supported vanadium catalytic systems has been investigated both in high temperature ethylene homopolymerization and in its copolymerization with 1-hexene. Addition of CH3CCl3 to the [VCl3, xAlCl(3)] or [VCl3, xCrCl(3)] system, leads to a strong productivity improvement. The intensity of the activating effect depends on the nature of the support. Results suggest that the activation involves both oxidation of V(II) deactivated species into potentially active trivalent ones, and generation of new active sites. Studies on the structure of ethylene/1-hexene copolymers show that the addition of halocarbons leads to copolymers with a higher comonomer content (SCB) and a better homogeneity in composition. |
| DOI |
http://dx.doi.org/10.1002/macp.1995.021961133 |
| ISBN |
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| Publisher |
|
| Book Title |
|
| ISSN |
1022-1352 |
| EISSN |
|
| Conference Name |
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| Bibtex ID |
ISI:A1995TE24700034 |
| Observations |
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