| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
In order to realize precise polymerization of versatile alfa-olefins such as propylene and styrene, novel [OSSO]-type bis(phenolate) ligands based on a trans-1,2-cyclooctanediyl platform and their zircoium complexes were developed. As a result, upon activation with dMAO (dried methylaluminoxane), the complex 4 was found to promote highly isospecific styrene polymerizations ([mm] = 97.5-99%) with high molecular weights up to 181,000 g mmol-1. When the Dmp-substituted pre-catalyst 5/dMAO system was used, the highest activity over 7,700 g mmol(5)-1 h-1 was recorded involving the formation of precisely isospecific polystyrenes of [mm] more than 99%.
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