http://www.cnr.it/ontology/cnr/individuo/prodotto/ID291888
Copolymerization of ethylene with alpha-olefins and cyclic olefins catalyzed by a Ti(iv) diisopropoxy complex bearing a tridentate [O -,S,O-]-type bis(phenolato) ligand (Articolo in rivista)
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- Copolymerization of ethylene with alpha-olefins and cyclic olefins catalyzed by a Ti(iv) diisopropoxy complex bearing a tridentate [O -,S,O-]-type bis(phenolato) ligand (Articolo in rivista) (literal)
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- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1039/c3py01674a (literal)
- Alternative label
Leone G.; Mauri M.; Losio S.; Bertini F.; Ricci G.; Porri L. (2014)
Copolymerization of ethylene with alpha-olefins and cyclic olefins catalyzed by a Ti(iv) diisopropoxy complex bearing a tridentate [O -,S,O-]-type bis(phenolato) ligand
in Polymer chemistry (Online)
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- Leone G.; Mauri M.; Losio S.; Bertini F.; Ricci G.; Porri L. (literal)
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- CNR-Istituto per Lo Studio Delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy; Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy (literal)
- Titolo
- Copolymerization of ethylene with alpha-olefins and cyclic olefins catalyzed by a Ti(iv) diisopropoxy complex bearing a tridentate [O -,S,O-]-type bis(phenolato) ligand (literal)
- Abstract
- Ethylene (E) was copolymerized with some ?-olefins [1-pentene (PEN), 1-hexene (HEX), and 4-methyl-1-pentene (4M1P)] and cyclic olefins [cyclopentene (CPE), norbornene (NB), and dicyclopentadiene (DCPD)] using the Ti(IV) thiobis(phenolate) complex [2,2?-S(4-Me,6-tBuC6H2O)2]Ti(OiPr)2 in combination with methylaluminoxane (MAO). The catalyst exhibited excellent activities (up to 106 g molTi-1 h-1). Crystalline E/?-olefin copolymers with a strong tendency for comonomer alternation were obtained with good comonomer incorporation (about 15 mol% for [Y]/[E] = 8; Y = comonomer) decreasing in the order HEX > PEN > 4M1P. Random copolymers with NB and DCPD were obtained with efficient comonomer incorporation (from 10 to 40 mol%) even for the Y/E molar ratio = 1 to 2, while the catalyst gave poor CPE incorporation. In order to collect information on the comonomer distribution in the copolymers, boiling solvent extraction was carried out and all the fractions were characterized by DSC, XRD, SEC, and NMR. (literal)
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