Silica/MAO/(n-BuCp)2ZrCl2 catalyst: effect of support dehydroxylation temperature on the grafting of MAO and ethylene polymerization

2016 ◽  
Vol 6 (9) ◽  
pp. 2962-2974 ◽  
Author(s):  
Muhammad Ahsan Bashir ◽  
Tom Vancompernolle ◽  
Régis M. Gauvin ◽  
Laurent Delevoye ◽  
Nicolas Merle ◽  
...  
Keyword(s):  
Ethylene Polymerization ◽  
Effect Of Support ◽  
Catalyst Effect

This study reports the role of silica dehydroxylation temperature on the performance of Silica/MAO/(n-BuCp)2ZrCl2 catalysts in ethylene homopolymerization.

A supported titanium postmetallocene catalyst: Effect of selected conditions on ethylene polymerization

2011 ◽  
Vol 123 (3) ◽  
pp. 1848-1852 ◽  
Author(s):  
Anna Pietruszka ◽  
Marzena Białek ◽  
Krystyna Czaja
Keyword(s):  
Ethylene Polymerization ◽  
Catalyst Effect

Elucidating the Key Role of Phosphine−Sulfonate Ligands in Palladium-Catalyzed Ethylene Polymerization: Effect of Ligand Structure on the Molecular Weight and Linearity of Polyethylene

ACS Catalysis ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 6101-6113 ◽  
Author(s):  
Ryo Nakano ◽  
Lung Wa Chung ◽  
Yumiko Watanabe ◽  
Yoshishige Okuno ◽  
Yoshikuni Okumura ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ethylene Polymerization ◽  
Ligand Structure ◽  
Palladium Catalyzed

scholarly journals Perceived Novelty Support and Psychological Needs Satisfaction in Physical Education

2020 ◽  
Vol 17 (11) ◽  
pp. 4169 ◽  
Author(s):  
Sebastián Fierro-Suero ◽  
Bartolomé J. Almagro ◽  
Pedro Sáenz-López ◽  
José Carmona-Márquez
Keyword(s):  
Physical Education ◽  
Intrinsic Motivation ◽  
Psychological Needs ◽  
Basic Psychological Needs ◽  
Mediation Model ◽  
Physical Education Teacher ◽  
Education Teacher ◽  
Psychological Need ◽  
Effect Of Support

In recent years, novelty has been proposed as a potential fourth basic psychological need. In the present study, the behavior of novelty resulting from support from the Physical Education teacher was evaluated in 723 students with an average age of 13.30 years old. The first objective was to validate the Support for Basic Psychological Needs-4 (SBPN-4) in Physical Education questionnaire, which included support for the novelty factor. The second objective was to test the mediation model in order to confirm the effect of support for novelty in relation to basic psychological needs and intrinsic motivation. The results obtained show that the Support for Basic Psychological Needs-4 (SBPN-4) questionnaire is a valid and reliable tool. On the other hand, support for novelty predicts satisfaction of basic psychological needs, particularly novelty satisfaction, which in turn predicts intrinsic motivation. These results show how the students are capable of perceiving the teacher’s support for novelty and how this positively influences their intrinsic motivation. Further investigations are required to continue developing our knowledge of the role of novelty as a basic psychological need.

Carbon Nano Tube Supported Pd Catalyst: Effect of Support Textual Properties with Pre-Treatment Method of Pd Particle

2015 ◽  
Vol 15 (11) ◽  
pp. 9052-9056 ◽  
Author(s):  
Young Bok Ryu ◽  
Ji Sun Kim ◽  
Jae Ho Baek ◽  
Myung Hwan Kim ◽  
Yangdo Kim ◽  
...  
Keyword(s):  
Treatment Method ◽  
Pd Catalyst ◽  
Pre Treatment ◽  
Effect Of Support ◽  
Catalyst Effect ◽  
Carbon Nano Tube ◽  
Supported Pd

Titanium pyridyl-phosphinimide complexes — Synthesis, structure, and ethylene polymerization catalysis

2006 ◽  
Vol 84 (5) ◽  
pp. 755-761 ◽  
Author(s):  
Chad Beddie ◽  
Pingrong Wei ◽  
Douglas W Stephan
Keyword(s):  
Molecular Weight ◽  
Key Words ◽  
Ethylene Polymerization ◽  
Olefin Polymerization ◽  
Polymerization Catalysts ◽  
Pyridyl Group ◽  
Molecular Weight Distributions ◽  
Polymerization Catalysis ◽  
Weight Distributions

A series of Ti–pyridyl-phosphinimide complexes of the form Cp′TiX2[NPR2(2-CH2Py)] (Cp′ = Cp, Cp*, R = i-Pr, t-Bu, X = Cl, Me) have been prepared and characterized. These complexes generate ethylene polymerization catalysts upon activation with MAO or B(C6F5)3. The resulting polymers exhibit broad molecular weight distributions. The role of the pyridyl group is discussed in light of stoichiometric reactions of CpTiCl2[NPR2(2-CH2Py)] with B(C6F5)3.Key words: phosphinimide complexes, pyridyl-phosphinimides, olefin polymerization.

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