Surface acidic sites on supported titanium-magnesium catalyst for propylene polymerization: ESR study via adsorption of stable nitroxyl radicals
ESR was used for studying the interaction between the stable nitroxyl radical TEMPO (2,2,6,6‐tetramethylpyperidin‐1‐oxyl) and the titanium‐magnesium catalysts TiCl4/MgCl2 and TiCl4/MgCl2 · nD (D is either diisobutyl phthalate or 2,2‐diisobutyl‐1,3‐dimethoxypropane), as well as TiCl4/MgCl2 · nD treat...
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| Veröffentlicht in: | Macromolecular chemistry and physics 1997-09, Vol.198 (9), p.2867-2873 |
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| container_title | Macromolecular chemistry and physics |
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| creator | Potapov, Alexandr G. Zakharov, Vladimir A. Mikenas, Tatijana B. Sergeev, Sergeyi A. Volodin, Alexandr M. |
| description | ESR was used for studying the interaction between the stable nitroxyl radical TEMPO (2,2,6,6‐tetramethylpyperidin‐1‐oxyl) and the titanium‐magnesium catalysts TiCl4/MgCl2 and TiCl4/MgCl2 · nD (D is either diisobutyl phthalate or 2,2‐diisobutyl‐1,3‐dimethoxypropane), as well as TiCl4/MgCl2 · nD treated with triethylaluminium. In all cases, only part of the surface titanium complexes (18–53 mol‐%) exhibit Lewis acid properties and can interact with TEMPO. The portion of titanium complexes with acidic properties depends on the composition and preparation of the catalysts, and it decreases upon treatment with triethylaluminium. |
| doi_str_mv | 10.1002/macp.1997.021980916 |
| format | Article |
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In all cases, only part of the surface titanium complexes (18–53 mol‐%) exhibit Lewis acid properties and can interact with TEMPO. 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Chem. Phys</addtitle><description>ESR was used for studying the interaction between the stable nitroxyl radical TEMPO (2,2,6,6‐tetramethylpyperidin‐1‐oxyl) and the titanium‐magnesium catalysts TiCl4/MgCl2 and TiCl4/MgCl2 · nD (D is either diisobutyl phthalate or 2,2‐diisobutyl‐1,3‐dimethoxypropane), as well as TiCl4/MgCl2 · nD treated with triethylaluminium. In all cases, only part of the surface titanium complexes (18–53 mol‐%) exhibit Lewis acid properties and can interact with TEMPO. 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Chem. Phys</addtitle><date>1997-09</date><risdate>1997</risdate><volume>198</volume><issue>9</issue><spage>2867</spage><epage>2873</epage><pages>2867-2873</pages><issn>1022-1352</issn><eissn>1521-3935</eissn><abstract>ESR was used for studying the interaction between the stable nitroxyl radical TEMPO (2,2,6,6‐tetramethylpyperidin‐1‐oxyl) and the titanium‐magnesium catalysts TiCl4/MgCl2 and TiCl4/MgCl2 · nD (D is either diisobutyl phthalate or 2,2‐diisobutyl‐1,3‐dimethoxypropane), as well as TiCl4/MgCl2 · nD treated with triethylaluminium. In all cases, only part of the surface titanium complexes (18–53 mol‐%) exhibit Lewis acid properties and can interact with TEMPO. The portion of titanium complexes with acidic properties depends on the composition and preparation of the catalysts, and it decreases upon treatment with triethylaluminium.</abstract><cop>Zug</cop><pub>Hüthig & Wepf Verlag</pub><doi>10.1002/macp.1997.021980916</doi><tpages>7</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| title | Surface acidic sites on supported titanium-magnesium catalyst for propylene polymerization: ESR study via adsorption of stable nitroxyl radicals |
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