Active centre determinations on MgCl2-supported forth- and fifth-generation Ziegler-Natta catalysts for propylene polymerization
Yaluma, AK; Tait P J T; Chadwick, JC
HERO ID
1313054
Reference Type
Journal Article
Year
2006
Language
English
| HERO ID | 1313054 |
|---|---|
| In Press | No |
| Year | 2006 |
| Title | Active centre determinations on MgCl2-supported forth- and fifth-generation Ziegler-Natta catalysts for propylene polymerization |
| Authors | Yaluma, AK; Tait P J T; Chadwick, JC |
| Journal | Journal of Polymer Science. Part A, Polymer Chemistry |
| Volume | 44 |
| Issue | 5 (Mar 2006) |
| Page Numbers | 1635-1647 |
| Abstract | Active centre determinations for Ziegler-Natta catalysts for propylene polymerisation were made by quenching the polymerisation with tritiated ethanol, and subjecting the polymers to radiochemical analysis. The objective was to investigate the high activities of the catalyst system of magnesium chloride and titanium tetrachloride with a diether, 9,9-bis(methoxymethyl)fluorene, as internal catalyst, by comparing the performance with that obtained using a phthalate ester, diisobutyl phthalate, as internal catalyst. Triethyl aluminium was used as the co-catalyst. Active centre contents were 2-8% of the total Ti present, and there was good correlation between the catalyst activity and activity centre content. It was proposed that the high activity of diether-containing catalysts was due to the increased proportion of active centres rather than to a difference in propagation rate coefficients. 30 refs. |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | POLYPROPYLENE; RATE OF POLYMERIZATION; POLYMERISATION CATALYSTS; PROPYLENE POLYMER; THERMOPLASTIC; ZIEGLER CATALYST; TABLES; PP; GRAPH; PLASTIC; POLYMERIZATION; CATALYTIC POLYMERIZATION; POLYPROPENE; POLYMERISATION KINETICS; CATALYTIC POLYMERISATION; POLYMERIZATION CATALYSTS; RATE OF POLYMERISATION; POLYMERISATION; CATALYST; POLYMERIZATION RATE; INSTITUTION; POLYMERIZATION CATALYST; POLYMERIZATION KINETICS; TECHNICAL; CATALYTIC ACTIVITY; ACTIVE CENTRE; KINETICS; POLYMERISATION CATALYST; ZIEGLER-NATTA CATALYST; POLYMERISATION RATE; PROPENE POLYMER |