scholarly journals Metallocene supported core@LDH catalysts for slurry phase ethylene polymerisation

2016 ◽  
Vol 52 (21) ◽  
pp. 4076-4079 ◽  
Author(s):  
Jean-Charles Buffet ◽  
Coral F. H. Byles ◽  
Ryan Felton ◽  
Chunping Chen ◽  
Dermot O'Hare
Keyword(s):  
Single Phase ◽  
Synergistic Effects ◽  
Hybrid Catalysts ◽  
Slurry Phase ◽  
Ethylene Polymerisation

Immobilisation of rac-(EBI)ZrCl2 on the hybrid catalysts, core@AMO-LDH, demonstrate synergistic effects in which the polymerisation activity is up to three times higher than rac-(EBI)ZrCl2 supported on analogous single phase supports.

Supported bis(peralkylindenyl)metallocene catalysts for slurry phase ethylene polymerisation

Polyhedron ◽  
2016 ◽  
Vol 116 ◽  
pp. 216-222 ◽  
Author(s):  
Phakpoom Angpanitcharoen ◽  
George Hay ◽  
Jean-Charles Buffet ◽  
Zoë R. Turner ◽  
Thomas A.Q. Arnold ◽  
...  
Keyword(s):  
Metallocene Catalysts ◽  
Slurry Phase ◽  
Ethylene Polymerisation

scholarly journals Group 4 permethylindenyl complexes for slurry-phase polymerisation of ethylene

2019 ◽  
Vol 10 (11) ◽  
pp. 1386-1398 ◽  
Author(s):  
Jessica V. Lamb ◽  
Jean-Charles Buffet ◽  
Zoë R. Turner ◽  
Dermot O'Hare
Keyword(s):  
Molecular Weights ◽  
Group 4 ◽  
Slurry Phase ◽  
Ethylene Polymerisation

Supported group 4 permethylindenyl based catalysts displayed extremely high ethylene polymerisation activity affording popcorn shaped low molecular weights polyethylenes.

Group 4 permethylindenyl constrained geometry complexes for ethylene polymerisation catalysis

2018 ◽  
Vol 8 (21) ◽  
pp. 5454-5461 ◽  
Author(s):  
Thomas J. Williams ◽  
Jean-Charles Buffet ◽  
Zoë R. Turner ◽  
Dermot O'Hare
Keyword(s):  
Group 4 ◽  
Constrained Geometry ◽  
Slurry Phase ◽  
Ethylene Polymerisation

The synthesis and characterisation of six permethylindenyl constrained geometry complexes is reported. Slurry phase ethylene polymerisation studies demonstrate that activities increase with increasing electron donating character of the amido fragment.

Ethylene polymerisation using solid catalysts based on layered double hydroxides

2015 ◽  
Vol 6 (13) ◽  
pp. 2493-2503 ◽  
Author(s):  
Jean-Charles Buffet ◽  
Zoë R. Turner ◽  
Robert T. Cooper ◽  
Dermot O'Hare
Keyword(s):  
Organic Solvent ◽  
Metal Complexes ◽  
Support System ◽  
Layered Double Hydroxides ◽  
Catalyst Support ◽  
Solid Catalysts ◽  
Slurry Phase ◽  
Double Hydroxide ◽  
Ethylene Polymerisation ◽  
Double Hydroxides

We report here the use of methylaluminoxane (MAO) modified aqueous miscible organic solvent treated (AMOST) layered double hydroxide, Mg6Al2(OH)16CO3·4H2O (AMO-Mg3Al-CO3) as a catalyst support system for the slurry phase polymerisation of ethylene using immobilised metallocene and non-metallocene metal complexes.

Synthesis and characterisation of permethylindenyl zirconium complexes and their use in ethylene polymerisation

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87456-87464 ◽  
Author(s):  
Jean-Charles Buffet ◽  
Thomas A. Q. Arnold ◽  
Zoë R. Turner ◽  
Phakpoom Angpanitcharoen ◽  
Dermot O'Hare
Keyword(s):  
Group 4 ◽  
Zirconium Complexes ◽  
Slurry Phase ◽  
Ethylene Polymerisation

We report here the synthesis, characterisation and use in solution and slurry phase ethylene polymerisation of new group 4 permethylindenyl complexes.

scholarly journals Slurry-phase ethylene polymerisation using group 4 ansa-bridged permethylindenyl complexes supported on polymethylaluminoxane

2020 ◽  
Vol 484 ◽  
pp. 110735 ◽  
Author(s):  
Jessica V. Lamb ◽  
Joseph C. Abell ◽  
Jack E. McLaren ◽  
Jean-Charles Buffet ◽  
Zoë R. Turner ◽  
...  
Keyword(s):  
Group 4 ◽  
Slurry Phase ◽  
Ethylene Polymerisation

scholarly journals Synthesis, characterisation and slurry phase ethylene polymerisation of rac-(PhBBI*)ZrCl2 immobilised on modified layered double hydroxides

2019 ◽  
Vol 468 ◽  
pp. 139-147 ◽  
Author(s):  
Grace E. Hickman ◽  
Christopher M.R. Wright ◽  
Alexander F.R. Kilpatrick ◽  
Zoë R. Turner ◽  
Jean-Charles Buffet ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Slurry Phase ◽  
Ethylene Polymerisation ◽  
Double Hydroxides

scholarly journals Polymethylaluminoxane organic frameworks (sMAOF) – highly active supports for slurry phase ethylene polymerisation

2021 ◽  
Author(s):  
Alexander F. R. Kilpatrick ◽  
Harry S. Geddes ◽  
Zoë R. Turner ◽  
Jean-Charles Buffet ◽  
Andrew L. Goodwin ◽  
...  
Keyword(s):  
Catalyst Supports ◽  
Highly Active ◽  
Slurry Phase ◽  
Ethylene Polymerisation

A series of modified solid polymethylaluminoxane (sMAO) catalyst supports have been developed for slurry phase ethylene polymerisation, using aryl di-ol modifier groups.

Influence of Heat Treatments on Microstructures in an Fe-Co-V Alloy

1974 ◽  
Vol 32 ◽  
pp. 512-513
Author(s):  
S. Mahajan ◽  
M. R. Pinnel ◽  
J. E. Bennett
Keyword(s):  
Single Phase ◽  
Alloy Composition ◽  
Supersaturated Solid Solution ◽  
Cell Formation ◽  
Heat Treatments ◽  
Air Cooling ◽  
Iced Brine ◽  
Transmission Electron ◽  
The Matrix ◽  
Bcc Structure

The microstructural changes in an Fe-Co-V alloy (composition by wt.%: 2.97 V, 48.70 Co, 47.34 Fe and balance impurities, such as C, P and Ni) resulting from different heat treatments have been evaluated by optical metallography and transmission electron microscopy. Results indicate that, on air cooling or quenching into iced-brine from the high temperature single phase ϒ (fcc) field, vanadium can be retained in a supersaturated solid solution (α2) which has bcc structure. For the range of cooling rates employed, a portion of the material appears to undergo the γ-α2 transformation massively and the remainder martensitically. Figure 1 shows dislocation topology in a region that may have transformed martensitically. Dislocations are homogeneously distributed throughout the matrix, and there is no evidence for cell formation. The majority of the dislocations project along the projections of <111> vectors onto the (111) plane, implying that they are predominantly of screw character.

Raman And Fluorescence Spectra Observed in Laser Microprobe Measurements of Several Compositions in the Ln-Ba-Cu-O System

1990 ◽  
Vol 48 (2) ◽  
pp. 278-279
Author(s):  
Edgar S. Etz ◽  
Thomas D. Schroeder ◽  
Winnie Wong-Ng
Keyword(s):  
Fluorescence Spectra ◽  
Single Phase ◽  
X Ray Diffraction ◽  
Ceramic Powders ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Raman Microprobe ◽  
Methods Of Synthesis ◽  
Compositional Homogeneity ◽  
Processing Techniques

We are investigating by Raman microprobe measurements the superconducting and related phases in the LnBa2Cu3O7-x (for x=0 to 1) system where yttrium has been replaced by several of the lanthanide (Ln = Nd,Sm,Eu,Ho,Er) elements. The aim is to relate the observed optical spectra (Raman and fluorescence) to the compositional and structural properties of these solids as part of comprehensive materials characterization. The results are correlated with the methods of synthesis, the processing techniques of these materials, and their superconducting properties. Of relevance is the substitutional chemistry of these isostructural systems, the differences in the spectra, and their microanalytical usefulness for the detection of impurity phases, and the assessment of compositional homogeneity. The Raman spectra of most of these compounds are well understood from accounts in the literature.The materials examined here are mostly ceramic powders prepared by conventional solid state reaction techniques. The bulk samples are of nominally single-phase composition as determined by x-ray diffraction.

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