Syndiospecific Living Polymerization of Propene with [t-BuNSiMe₂Flu]TiMe₂ Using MAO as Cocatalyst. Volume 34, Number 10, May 8, 2001, pp 3142−3145.

Synthesis, Morphology, and Field-Effect Transistor Characteristics of Crystalline Diblock Copolymers Consisted of Poly(3-hexylthiophene) and Syndiotactic Polypropylene

“…General Procedure. All reactions and manipulations were conducted under a nitrogen atmosphere using the standard 49 The resulting TMA-free MAO was diluted in toluene to the desired concentration before use. Me 2 C(Cp)(Flu)-ZrCl 2 , 50,51 2-bromo-3-hexylthiophene, 52 and lithium diisopropylamide (LDA) 52 were synthesized using the method described in the literature.…”

Real-time analysis of methylalumoxane formation

“… 11,17 The TMA in MAO can be divided into two kinds: “bound TMA” which is incorporated in the MAO and “free TMA” which can be removed under vacuum to form TMA-depleted MAO (DMAO). 18 Free TMA can be effectively trapped by adding a sterically hindered phenol such as 2,6-di- tert -butyl-4-methylphenol (BHT). 19,20 The catalytic productivity and polymer molecular weight depends on the amount of free TMA in MAO and its synthesis history.…”

Living Random Copolymerization of Propylene and Norbornene with ansa-Fluorenylamidodimethyltitanium Complex: Synthesis of Novel Syndiotactic Polypropylene-b-poly(propylene-ran-norbornene)

“…Poly(propylene-ran-norbornene) showed a higher T g value than poly(ethylene-ran-norbornene) with the same norbornene content and molar mass, but the catalysts which copolymerize propylene and norbornene are very limited. 13 We have previously reported that [t-BuNSiMe 2 Flu]TiMe 2 (1) activated by Me 3 -Al-free dried aluminoxane (dMAO) not only conducted living polymerization of propylene and norbornene 14,15 but also copolymerized propylene and norbornene with high activity to produce random copolymers, of which T g values showed a good linear relationship with norbornene content in the copolymers. 16 We have recently found that the introduction of the tert-butyl substituents on the fluorenyl ligand of 1 at the 3,6-position [t-BuNSiMe 2 (3,6-t-Bu 2 Flu)]TiMe 2 (2) improved the activity and syndiospecificity in propylene polymerization to give living polypropylene (PP) with the syndiotactic triad of 0.93 and melting point of 142 °C.…”