Unusual effect of diethyl zinc and triisobutylaluminium in ethylene/1-hexene copolymerisation using an MgCl2-supported Ziegler-Natta catalyst
Perin, SGM; Severn, JR; Koning, CE; Chadwick, JC
| HERO ID | 1312182 |
|---|---|
| In Press | No |
| Year | 2006 |
| Title | Unusual effect of diethyl zinc and triisobutylaluminium in ethylene/1-hexene copolymerisation using an MgCl2-supported Ziegler-Natta catalyst |
| Authors | Perin, SGM; Severn, JR; Koning, CE; Chadwick, JC |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 207 |
| Issue | 1 |
| Page Numbers | 50-56 |
| Abstract | The use of triisobutylaluminium and diethyl zinc as cocatalyst and chain transfer agent respectively in ethylene/1-hexene copolymerisation, carried out with a Ziegler-Natta catalyst of type MgCl2/TiCl4/diisobutyl phthalate, has been found to give significantly higher comonomer incorporation than was obtained when triethylaluminium was used in combination with diethyl zinc. Triisobutylaluminium reacts readily with diethyl zinc, yielding metallic zinc, most likely via the formation of intermediate hydride species. In contrast, the use of 2,6-dimethylpyridine as external donor in this system has been found to have relatively little effect on comonomer incorporation and distribution, indicating that a change from tendentially isospecific to syndiospecific propagation in propene polymerisation is not accompanied by a major improvement in comonomer distribution in ethylene/ 1-hexene copolymerisation. |
| Doi | 10.1002/macp.200500424 |
| Wosid | WOS:000234641100006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science 000234641100006 |
| Is Public | Yes |
| Keyword | copolymerization; diethyl zinc; polyethylene (PE); Ziegler-Natta polymerization |