2022
DOI: 10.1021/acscatal.2c02705
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Influence of Silica-Supported Alkylaluminum on Heterogeneous Zwitterionic Anilinonaphthoquinone Nickel and Palladium-Catalyzed Ethylene Polymerization and Copolymerization with Polar Monomers

Abstract: The development of the heterogeneous late transition metal-catalyzed olefin (co)­polymerization is a challenge in current research. Here, we report the preparation of heterogeneous anilinonaphthoquinone nickel and palladium catalysts by the binding of SiO2-supported alkylaluminums to a quinone oxygen of the ligand (Mt-AlR 3 /SiO 2 ). The heterogeneous nickel catalyst exhibited a very high activity (up to 10.4 × 106 g mol–1 h–1) for ethylene polymerizations to produce semicrystalline high-molecular-weight (M… Show more

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Cited by 11 publications
(12 citation statements)
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“…The use of supported catalysts led to good product morphological control and avoidance of reactor fouling (Figure A). Moreover, due to the polar polyolefin component derived from 10-undecenoic acid (containing ca. 2 wt % of polar monomer unit), the in-reactor blend resulting from the heterogeneous catalyst exhibits better hydrophilicity than the product of homogeneous polymerization (Figure B,C).…”
Section: Resultsmentioning
confidence: 99%
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“…The use of supported catalysts led to good product morphological control and avoidance of reactor fouling (Figure A). Moreover, due to the polar polyolefin component derived from 10-undecenoic acid (containing ca. 2 wt % of polar monomer unit), the in-reactor blend resulting from the heterogeneous catalyst exhibits better hydrophilicity than the product of homogeneous polymerization (Figure B,C).…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, the application of the dual-site catalysts obtained by combining different single-site molecular catalysts (Figure B) in the synthesis of polyolefin in-reactor blends has attracted more and more attention since 1980s. , These well-defined dual-site molecular catalysts make it possible to achieve better control of the polymerization reaction and to produce a broad range of polyolefins for a diverse range of applications due to a good understanding of the reaction mechanism and the relationship between the catalyst structure and the polymer structure. Heterogeneous dual-site catalysts are preferred in industry due to their product morphology control, thereby preventing reactor fouling typical of slurry and gas-phase polymerization using homogeneous systems. Typically, a single-site catalyst can be supported on the surface of the solid particles (including the surface of the internal pores) by ions and hydrogen or covalent bonds (Figure B). …”
Section: Introductionmentioning
confidence: 99%
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“…126 Heterogeneous catalyst Pd110-Al/SiO 2 (Figure 31) was further developed by introduction of Al compounds. 127 Enhanced activity (up to 30 kg copolymer/(mol Pd h)) is observed in Pd110-Al/SiO 2 system. The resultant semicrystalline EMA copolymers produced by Pd110-Al/SiO 2 catalyst have lower molecular weights (M n = 4.7-5.2 kg/mol) but with high melting temperatures (120 C) compared to those synthesized with Pd110.…”
Section: [No] Bidentate Chelate Palladiummentioning
confidence: 97%
“…The supported Pd110/SiO 2 produces EMA copolymers with higher molecular weights ( M n up to 98 kg/mol) but lower MA incorporation (0.5–0.7 mol%) than homogeneous palladium system Pd110 126 . Heterogeneous catalyst Pd110‐Al/SiO 2 (Figure 31) was further developed by introduction of Al compounds 127 . Enhanced activity (up to 30 kg copolymer/(mol Pd h)) is observed in Pd110‐Al/SiO 2 system.…”
Section: Palladium Catalysts For Ethylene/acrylate Copolymerizationmentioning
confidence: 99%