Premium
Silyl‐Terminated Ethylene‐ co ‐Norbornene Copolymers by Organotitanium‐Based Catalysts
Author(s) -
Marconi Roberto,
Ravasio Andrea,
Boggioni Laura,
Tritto Incoronata
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800559
Subject(s) - norbornene , copolymer , silane , ethylene , polymer chemistry , silylation , polymer , heteroatom , catalysis , chemistry , materials science , organic chemistry , ring (chemistry)
Ethylene (E) and norbornene (N) were copolymerized in the presence of PhSiH 3 as chain‐transfer agent with [Ti( η 5 : η 1 ‐C 5 Me 4 SiMe 2 NBu t )( η 1 ‐Me) 2 ] precatalyst combined with [Ph 3 C][B(C 6 F 5 ) 4 ]. The silane was introduced at chain‐ends of E‐ co ‐N copolymers with concomitant reinitiation of the growing polymer chain. The concentrations of the silane and polymer molecular weight are inversely correlated. The characteristic signals of SiH 2 Ph chain‐ends were observed by 1 H NMR. The Si heteroatom is predominantly adjacent to ethylene units in E‐ co ‐N copolymers with high N content.