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This article commemorates the 50th anniversary of the passing of Karl Ziegler, a Nobel Prize-winning German chemist, by exploring his scientific journey and remarkable contributions. Ziegler's unwavering passion for science, unique thinking, and exceptional experimental skills formed the bedrock of his scientific endeavors. His research primarily focused on free radical compounds, polycyclic compounds, and organometallic compounds. The Ziegler-Natta catalyst, which he co-invented and named alongside Giulio Natta, had far-reaching implications for the global polyolefin industry, giving rise to a market worth billions of dollars. [ABSTRACT FROM AUTHOR]

MgCl2/2-Ethylhexanol/TiCl4system was used to synthesize spherical Ziegler-Natta catalyst for ethylene polymerization, and the composite internal electron donor was added in the synthesis process:nhexyl acetate/diisobutyl phthalate was compared with tetraethoxysilane, ethyl acetate and diisobutyl phthalate as electron donors, respectively.The catalysts and polymers containing different internal electron donors were analyzed by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC), and the catalytic performance of the catalysts was evaluated by ethylene polymerization.The results showed that under the conditions of temperature 80℃, pressure0.5 MPa and time 2 h, the catalytic activity of the catalyst containing complex internal electron donornhexyl acetate/diisobutyl phthalate was higher than that of other single internal electron donor catalysts, and the catalytic activity was 1.24×105g PE/(molTi·h). [ABSTRACT FROM AUTHOR]