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Organic-Supported Single-Site Catalysts for Olefin Polymerization
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DOI：10.1016/j.progpolymsci.2026.102121.png)
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Abstract
En 中文
Polyolefins represent one of the most widely produced and utilized classes of chemical commodities globally, underpinning a broad range of industrial applications. Their production has traditionally relied on inorganic-supported catalysts, predominantly based on MgCl2 and silica. However, organic supports have gained increasing attention due to their distinctive advantages, including tunable chemical structures, adjustable morphologies, softer frameworks that can facilitate monomer diffusion, and enhanced compatibility with monomers and products. Organic-supported single-site catalysts (SSCs) therefore provide promising opportunities to achieve precise control over polymer chain structures and properties, enhance catalytic efficiency, and facilitate improved regulation of polymer morphology. Additionally, they are potentially compatible with existing industrial gas-phase or slurry production processes, while also contributing to reduced reactor fouling. Over the past decade, significant breakthroughs have been achieved in the development of organic-supported SSCs for olefin polymerization. These include the introduction of solid polymethylaluminoxane (sMAO), metal-organic frameworks (MOFs), and covalent organic frameworks (COFs) as novel supporting materials for SSCs. Furthermore, innovative immobilization strategies, including cation exchange and direct ion-pair formation, have been developed. This review critically assesses recent advances in organic supports for SSC immobilization, with particular emphasis on structure-property relationships, immobilization mechanisms, and catalytic performance. Despite these advances, several key challenges remain, including complex multi-step syntheses, difficulties in scalable production, insufficient thermal and mechanical stability, non-uniform pore distributions, and limited compatibility with diverse catalyst systems. Future progress will likely require the integration of precise surface functionalization, hierarchical pore design, nanoscale morphological control, and data-driven modeling to enhance catalyst stability, selectivity, and industrial feasibility. Although still at a developmental stage, organic-supported SSCs hold significant promise for enabling next-generation polyolefin production development, particularly if key technical barriers can be overcome through coordinated academic and industrial efforts.
Keywords:
Organic-supported catalysts
Single-site catalysts
Olefin polymerization
Polymerization mechanisms
Catalytic efficiency
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26.1
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