Broad Molecular Weight Polypropylene Synthesis using Mixed Internal Donor Incorporated Magnesium Dichloride Supported Titanium Catalyst

Autor:	Virendrakumar Gupta, Harshad Ramdas Patil, Dhananjay Ghelabhai Naik
Rok vydání:	2011
Předmět:	Polymers and Plastics Magnesium Inorganic chemistry chemistry.chemical_element Electron donor General Chemistry Catalysis Sulfone chemistry.chemical_compound chemistry Polymerization Materials Chemistry Ceramics and Composites Titanium tetrachloride Sulfolane Titanium
Zdroj:	Journal of Macromolecular Science, Part A. 48:227-232
ISSN:	1520-5738 1060-1325
DOI:	10.1080/10601325.2011.544937
Popis:	Magnesium dichloride supported titanium tetrachloride catalyst with mixed internal donor, comprised of ethylbenzoate and sulfolane, were synthesized. The composition characteristics of catalysts indicate incorporation of sulfolane to max 8.2 wt%, in addition to ethylbenzoate. The amount of incorporated donors in solid catalyst is dependent on the sulfolane concentration and reaction temperature of the process. A physical characteristics study of catalyst indicated that morphology, crystallite size, surface area, pore volume and titanium distribution have not been influenced much by incorporation of the second internal donor (sulfolane). The catalysts, in combination with triethyl aluminum as cocatalyst and p-ethoxyethylbenzoate as external donor, show good activity for propylene polymerization. The polypropylene synthesized with an optimized catalyst system shows broad molecular weight distribution as compared to ethylbenzoate based catalyst.
Databáze:	OpenAIRE
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