期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 55, 期 14, 页码 2298-2308出版社
WILEY
DOI: 10.1002/pola.28614
关键词
catalysts; morphology; structure-property relations; polyethylene (PE); pore structure; scanning electron microscopy (SEM); structure-property relation; Ziegler-Natta polymerization
资金
- Ministry of Education and Science of the Russian Federation
- [0303-2016-0009]
The structure and formation of polyethylene (PE) particles on supported titanium-magnesium catalysts having different structural characteristics (sizes of microcrystallites, mesopores, and subparticles) were studied for the first time. Scanning electron microscopy was used to identify structural elements of the polymer particles formed over such catalysts and to reveal morphological changes in the growing polymer particles when the yield was increased from approximately 0.2 g PE/g catalyst to approximately 13 kg PE/g catalyst. A relationship was found between structural characteristics of the porous catalyst particles, morphology of the nascent polymer particles, and bulk density of the polymer powder. (C) 2017 Wiley Periodicals, Inc.
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