Characteristics of diether- and phthalate-based Ziegler-Natta catalysts for copolymerization of propylene and ethylene and terpolymerization of propylene, ethylene, and 1-butene
| Autor: | Bo Geun Song, Young Heon Choi, Son-Ki Ihm |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Ethylene Materials science Polymers and Plastics biology 1-Butene General Chemistry Polymer Natta biology.organism_classification Surfaces Coatings and Films Catalysis law.invention chemistry.chemical_compound Differential scanning calorimetry chemistry law Polymer chemistry Materials Chemistry Copolymer Organic chemistry Crystallization |
| Zdroj: | Journal of Applied Polymer Science. 130:851-859 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.39244 |
| Popis: | Copolymerization of propylene and ethylene and terpolymerization of propylene, ethylene, and 1-butene were carried out to compare the characteristics of diether- and phthalate-based Ziegler-Natta catalysts in a reaction system of pilot scale. The ethylene incorporation with the diether-based catalyst was higher but the 1-butene incorporation was lower compared with those of the phthalate-based catalyst. In the case of copolymers from the diether-based catalyst, melting behavior, determined through differential scanning calorimetry (DSC), showed a distinct shoulder peak and lots of nuclei were formed during crystallization. The diether-based catalyst led to polymers having blockier ethylene sequences compared with those of the phthalate-based catalyst; the highly crystallizable fraction (HIS) containing blockier ethylene sequences was produced with the diether-based catalyst. These results seem to be the result of regio-irregular characteristics of the diether-based catalyst. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 851-859, 2013 |
| Databáze: | OpenAIRE |
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