title: Reactivity of secondary metal-alkyls in catalytic propene polymerization: how dormant are "dormant chains"?
abstract: In this communication, we report on the direct measurement of dormant chain concentration and of the relative reactivity of authentic primary and secondary Zr-polymeryls toward propene, ethene, and H2 under practical conditions for a new highly regio- and stereoselective postmetallocene polymerization catalyst with controlled kinetic behavior. The results, in particular, confirm the poor reactivity toward propene of secondary M-polymeryls and the possible accumulation of dormant chains in propene homopolymerization.
authors.affiliation: Dipartimento di Chimica, Università di Napoli Federico II, Via Cintia, 80126 Naples, Italy. busico@unina.it
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Busico
authors.forename: Roberta
authors.initials: R
authors.lastname: Cipullo
authors.forename: Valeria
authors.initials: V
authors.lastname: Romanelli
authors.forename: Sara
authors.initials: S
authors.lastname: Ronca
authors.forename: Maria
authors.initials: M
authors.lastname: Togrou