POLYMERISATION STEREOCHEMISTRY WITH ZIEGLER-NATTA CATALYSTS CONTAINING DIALKYLPROPANE DIETHERS. A TOOL FOR UNDERSTANDING INTERNAL/EXTERNAL DONOR RELATIONSHIPS
Sacchi, MC; Forlini, S; Tritto, I; Locatelli, P; Morini, G; Noristi, L; Albizzati, E
| HERO ID | 1313057 |
|---|---|
| In Press | No |
| Year | 1996 |
| Title | POLYMERISATION STEREOCHEMISTRY WITH ZIEGLER-NATTA CATALYSTS CONTAINING DIALKYLPROPANE DIETHERS. A TOOL FOR UNDERSTANDING INTERNAL/EXTERNAL DONOR RELATIONSHIPS |
| Authors | Sacchi, MC; Forlini, S; Tritto, I; Locatelli, P; Morini, G; Noristi, L; Albizzati, E |
| Journal | Macromolecules |
| Abstract | Propylene was polymerised by a new generation of magnesium-supported Ziegler-Natta catalysts which contained dialkylpropane diethers as external donors. They were capable of producing highly active and stereospecific catalysts without any external donor. The behaviour of three different diethers (2,2-diisobutyl-1,3-dimethoxypropane, 2,2-dicyclopentyl-1,3-dimethoxypropane and 2-ethyl-2-butyl-1,3-dimethoxypropane) as internal donors was compared with the behaviour of the same diethers when they were used as external donors with a catalyst containing diisobutyl phthalate as internal donor. The results show that the same isospecific centres are produced when the same diether donor is present as an internal donor or replaces diisobutyl phthalate during polymerisation when it is added as an external donor. The present results are collated with previous results to provide conclusions on the role and reciprocal behaviour of internal and external donors. Isotacticity index and isotactic productivity data are shown. 29 refs. |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | POLYPROPYLENE; ACTIVE SITE; STEREOSPECIFIC POLYMERIZATION; ZIEGLER-NATTA POLYMERIZATION; STEREOSPECIFIC POLYMERISATION; ZIEGLER-NATTA POLYMERISATION; POLYMERIZATION COCATALYST; THERMOPLASTIC; TABLES; PP; ISOTACTIC POLYMERIZATION; ITALY; EUROPEAN UNION; STEREOSPECIFIC CATALYST; PLASTIC; ELECTRON DONOR; POLYMERISATION COCATALYST; EUROPEAN COMMUNITY; ZIEGLER-NATTA CATALYST; COMPANY; ISOTACTIC POLYMERISATION; DATA; POLYMERIZATION CATALYST; TECHNICAL; CATALYTIC ACTIVITY; POLYMERISATION CATALYST; ISOTACTIC; TRIAD; WESTERN EUROPE |