Evaluation of catalytic activity in ethylene polymerization and ethylene/10-undecen-1-ol copolymerization of new orthopalladated complexes derived from tridentade ligands [C,N,S]

[Display omitted] ► Orthopalladated complex/MAO systems have high activity in ethylene polymerization. ► Polyethylene obtained is linear with narrow molecular weight distributions. ► Orthopalladated complex/MAO systems produce ethylene/10-undecen-1-ol copolymer with high activities. ► Pd/Al systems...

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Published in:Applied catalysis. A, General General, 2012-02, Vol.417-418, p.1-5
Main Authors: Ortega-Jiménez, Fernando, López-Cortés, José G., Ortega-Alfaro, M. Carmen, Penieres-Carrillo, J. Guillermo, Quijada, Raúl, Alvarez-Toledano, Cecilio
Format: Article
Language:English
Subjects:
Aluminum
Catalysis
Catalysts
Chemistry
Copolymerization
Ethylene
Ethylene polymerization
Exact sciences and technology
General and physical chemistry
Ligands
Molecular weight distribution
Orthopalladated complexes
Polymerization
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:[Display omitted] ► Orthopalladated complex/MAO systems have high activity in ethylene polymerization. ► Polyethylene obtained is linear with narrow molecular weight distributions. ► Orthopalladated complex/MAO systems produce ethylene/10-undecen-1-ol copolymer with high activities. ► Pd/Al systems behave as single site catalysts in both cases. This paper describes catalytic applications of new orthopalladated complex/MAO systems in polymerization of ethylene and copolymerization of ethylene/10-undecen-1-ol. Orthopalladated complexes 1–5 were synthesized from tridentate ligands [C, N, S], with a general formula of PdLX, where L=[Ph2NNC(CH3)CSRSR] and R=CH3, CH2CH2 and X=Cl, CCPh, CCSi(CH3)3. These catalytic systems show high catalytic activity in ethylene polymerization, especially when the reactions were carried out at a temperature of 80°C. The polyethylene obtained is linear with narrow molecular weight distributions, indicating that Pd/Al systems behave as single site catalysts. The results obtained in copolymerization of ethylene/10-undecen-1-ol indicate that orthopalladated complex/MAO system produces copolymers with molecular weight distributions unimodal and close to 2, indicating that the Pd/Al systems also act as single site catalysts.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2011.12.006