Results 291 to 300 of about 26,493 (337)

Olefin Polymerization at Aluminum? A Theoretical Study

Organometallics, 2001
We have studied the balance between olefin insertion and β-hydrogen transfer to monomer for all “well-defined” aluminum polymerization catalysts reported to date. Consistently, the balance is predicted to be significantly worse than for Me2AlEt, implying that none of the proposed active species should give a high-molecular-mass polymer.
TALARICO, GIOVANNI, BUSICO V, BUDZELAAR, Petrus Henricus Maria   +2 more
openaire   +3 more sources

Catalytic polymerization of olefins

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1960
Ya. T. Eidus, K. V. Puzitskii, N. I. Ershov, B. A. Kazanskii   +3 more
  +9 more sources

Polymerization of olefin oxides and of olefin sulfides

Journal of Polymer Science Part A-1: Polymer Chemistry, 1966
AbstractTwo new catalyst systems, sulfur–diethylzinc and 98% hydrogen peroxide–diethylzinc, have been investigated for polymerizing propylene oxide. The sulfur–diethylzinc catalyst system has a broad range of sulfur/zinc atomic ratio for polymerizing propylene oxide heterogeneously to high molecular weight materials in high yields.
openaire   +1 more source

Catalytic Olefin Polymerization

1984
Table 1 gives the world production data regarding polyolefins and their copolymers as well as those concerning the other main plastics. As may be inferred from such data, the polyethylenes obtained via catalytic processes and polypropylenes (homopolymers and modified products) rank fourth and fifth in terms of quantities produced.
I. Pasquon, U. Giannini
openaire   +1 more source

Metathesis Polymerization of Olefins and Polymerization of Alkynes

1998
Part I: Metathesis Polymerization of Olefins: Romp and Admet. Ring-Opening Metathesis Polymerization by Molybdenum Imido Alkylidene Complexes R.R. Schrock. Metathesis of Low-Strain Olefins and Functionalized Olefins with New Ruthenium-Based Catalyst Systems A.F. Noels, A. Demonceau.
openaire   +1 more source

Scope of Olefin Polymerization Nickel Catalysts

Science, 2000
In their report “Neutral single-component nickel (II) catalysts that tolerate heteroatoms” (21 Jan., p. 460), T. R. Younkin et al. describe the development of a family of polymerization catalysts that are tolerant of many functional groups and low-purity starting materials.
Ostoja Starzewski, K. Aleksander, Younkin, Todd R., Connor, Eric F., Henderson, Jason I., Friedrich, Stefan K., Grubbs, Robert H., Bansleben, Donald A.   +6 more
openaire   +3 more sources

Olefin Polymerization Catalysts

2011
Catalytic polymerization processes have become increasingly important as the use of plastics has escalated throughout the world. Many common plastics were discovered in the 1930s, and after the 1939–1945 war this created a demand for petrochemical intermediates derived from the refining industry.
openaire   +1 more source

5627117 Olefin polymerization catalyst and process for olefin polymerization

Journal of Molecular Catalysis A: Chemical, 1997
Teruak Mukaiyama, Makoto Mitani, Kunihiro Oouchi   +2 more
openaire   +1 more source

Mono-and Dinuclear Olefin Polymerization at Aluminum

2002
As an alternative to the standard Cossee mechanism, in which olefin insertion involves two sites at a single metal centre, we have investigated a true dinuclear alternative where the chain switches between two different metal centres at each insertion.
BUDZELAAR, Petrus Henricus Maria, TALARICO, GIOVANNI   +1 more
openaire   +3 more sources

The Kinetics of the Stereospecific Polymerization of α-Olefins

1959
Publisher Summary This chapter focuses on the kinetics of the stereospecific polymerization of α-olefins. The stereospecific polymerization of α-olefins takes place only in the presence of heterogeneous catalytic systems, including a crystalline substrate and a suitable metallorganic compound.
G. NATTA, I. PASQUON
openaire   +1 more source