A solid-state 13C NMR study on heterogeneous Ziegler-Natta catalyst components
Sormunen, P; Hjertberg, T; Iiskola, E
| HERO ID | 1313029 |
|---|---|
| In Press | No |
| Year | 1990 |
| Title | A solid-state 13C NMR study on heterogeneous Ziegler-Natta catalyst components |
| Authors | Sormunen, P; Hjertberg, T; Iiskola, E |
| Journal | Die Makromolekulare Chemie. Rapid communications |
| Volume | 191 |
| Issue | 11 |
| Page Numbers | 2663–2673 |
| Abstract | Ziegler-Natta catalysts supported on MgCl2 have been studied by CP-MAS (cross-polarization, magic-angle spinning) 13C NMR spectroscopy. The support was activated mechanically and chemically, and then treated with a monoester (ethyl benzoate) or a diester (diisobutyl phthalate). Catalytic species were obtained by a treatment with TiCl4. Complexation and crystal disordering phenomena are clearly observed as changes in the chemical shifts and line broadenings. Line splittings were observed, especially for the diester due to nonequivalent crystal coordination sites. The diester shows a different behaviour compared to the monoester thus reflecting its better ability as a stereoselectivity-controlling agent. The titanation led to the formation of a new, estercontaining and ordered complex on the surface of the carrier. The mobility of the surface complexes is restricted, crystalline complexes being more constrained. |
| Doi | 10.1002/macp.1990.021911115 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | CRYSTAL STRUCTURE; SOLID STATE; SURFACE TENSION; COMPLEX FORMATION; CRYSTALLINITY; THERMOPLASTIC; TABLES; SURFACE ENERGY; MAGIC ANGLE; PLASTIC; ZIEGLER-NATTA CATALYST; NMR; COMPANY; SOLID-STATE; DATA; POLYMERIZATION CATALYST; SCANDINAVIA; TECHNICAL; FINLAND; COMPANIES; POLYMERISATION CATALYST; NUCLEAR MAGNETIC RESONANCE; WESTERN EUROPE |