Results of a 13C NMR study of polypropene and ethene (I)-propene copolymers (I content <2%) prepd. in the presence of MgCl-supported TiCl4-AlEt3 catalysts confirm that significant amts. of syndiotactic polymer are obtained, under proper conditions. Formation of mainly syndiotactic sequences occurs via 1-2 (primary) monomer addn., possibly with a chain-end stereocontrol. At appropriate catalytic sites, sequences can be formed having high syndiotactic stereoregularity
ON THE MECHANISM OF SYNDIOTACTIC PROPENE POLYMERIZATION IN THE PRESENCE OF TI-BASED HETEROGENEOUS ZIEGLER-NATTA CATALYSTS / Busico, Vincenzo; Corradini, P; Demartino, L.. - In: DIE MAKROMOLEKULARE CHEMIE. RAPID COMMUNICATIONS. - ISSN 0173-2803. - STAMPA. - (1991), pp. 49-54.
ON THE MECHANISM OF SYNDIOTACTIC PROPENE POLYMERIZATION IN THE PRESENCE OF TI-BASED HETEROGENEOUS ZIEGLER-NATTA CATALYSTS
BUSICO, VINCENZO;
1991
Abstract
Results of a 13C NMR study of polypropene and ethene (I)-propene copolymers (I content <2%) prepd. in the presence of MgCl-supported TiCl4-AlEt3 catalysts confirm that significant amts. of syndiotactic polymer are obtained, under proper conditions. Formation of mainly syndiotactic sequences occurs via 1-2 (primary) monomer addn., possibly with a chain-end stereocontrol. At appropriate catalytic sites, sequences can be formed having high syndiotactic stereoregularityI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
