Study of the Effect of Internal Donors Composition in the Titanium-Magnesium Catalysts on the Molecular Weight Distribution of Polyethylene, Polypropylene, and Polyhexene

被引：0
作者：
Matsko, M. A. [1 ]
Echevskaya, L. G. [1 ]
Barabanov, A. A. [1 ]
Zakharov, V. A. [1 ]
机构：
[1] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk, Russia
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2025年
关键词：
hydrogen effect; internal donors; molecular mass distribution; polyethylene; polyhexene; polypropylene; titanium-magnesium Ziegler-Natta catalysts; ZIEGLER-NATTA CATALYSTS; PROPENE POLYMERIZATION; PROPYLENE POLYMERIZATION; SUPPORTED CATALYSTS; EXTERNAL DONORS; ELECTRON-DONORS; STEREOSPECIFICITY; TOOL; REGIOSELECTIVITY; HYDROGEN;
D O I：
10.1002/app.57022
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
New experimental data were obtained on the effect of internal donors composition (di-n-butyl phthalate, diethyl 2,3-diisobutyl succinate and 2-isopropyl-2-isopentyl-1,3-dimethoxypropane) in the titanium-magnesium catalysts (TMCs) on the molecular weight distribution of polyethylene, polypropylene, and polyhexene produced over these catalysts during polymerization in the absence and in the presence of hydrogen. These data show the great effect of monomer structure and the presence of hydrogen at the polymerization of alpha-olefins on the molecular weight distribution (polydispersity) of polymers. We propose these results are determined by the heterogeneity of active sites with different regiospecificity in the chain transfer reaction with hydrogen at the polymerization of alpha-olefins.
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页数：12
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