The Role of Two Different Internal Donors (Phthalate and 1,3-Diether) on the Formation of Surface Structure in MgCl2-Supported Ziegler-Natta Catalysts and Their Catalytic Performance of Propylene Polymerization

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The role of two different internal donors [a phthalate (diisobutylphthalate) and a 1,3-diether (2,2-diisobutyl-1,3-dimethoxypropane)] on the formation of surface structure in MgCl2-supported Ziegler-Natta catalysts and their catalytic performance of propylene polymerization was investigated by comparing and correlating the catalyst structures and the polymerization characteristics. In the catalyst formation, the 1,3-diether had better affinity for the MgCl2 surface than the phthalate and the 1,3-diether generated the (110) surface more than the (104) surface while the phthalate generated both the (110) and (104) surfaces of MgCl2. With both donors introduced, the (110) and (104) surfaces were generated simultaneously, although the (110) surface was dominant due to the higher affinity via the 1,3-diether. In addition, it seemed probable that the active sites formed on the (110) plane showed isospecific characteristics in the presence of a donor while those formed on the (104) plane could be isospecific regardless of a donor.
Publisher
WILEY-BLACKWELL
Issue Date
2014-08
Language
English
Article Type
Article
Keywords

PROPENE POLYMERIZATION; ELECTRON-DONORS; ACTIVE-CENTER; CHLORIDE; DIETHER; TOOL; SYSTEMS; MODEL; GOLD

Citation

JOURNAL OF APPLIED POLYMER SCIENCE, v.131, no.15

ISSN
0021-8995
DOI
10.1002/app.40536
URI
http://hdl.handle.net/10203/189394
Appears in Collection
CBE-Journal Papers(저널논문)
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