By Sunny Jacob, Joseph P. Kennedy (auth.), S. Inoue, S. Jacob, M. Jiang, J. P. Kennedy, M. Li, H. Sugimoto, M. Xiang, H. Zhou (eds.)
S. Jacob, J.P. Kennedy: Synthesis, Characterization and houses of Octa-Arm Polyisobutylene-Based famous person Polymers.- H.Sugimoto, S. Inoue: Polymerization via Metalloporphyrin and comparable Complexes.- M. Jiang, M. Li, M. Xiang, H. Zhou: Interpolymer Complexation and Miscibility Enhancement via Hydrogen Bonding.
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2. 1 ppm) compared with those for the MMA–3f and MMA–Me3Al systems under similar conditions. (II) Ligand-Exchange Reaction Between the Growing Species and Organoaluminum Compounds. A C6D6 solution of an equimolar mixture of the living polymer of MMA (2, R=Me; [MMA]0/[1 (X=Me)]0=10, 100% conversion) and 3f was studied by 1H NMR. 26 due, respectively, to the Me-Al group of 1 (X=Me) and the tBu group of 6 (R1=R2=R3= tBu). However, throughout the observation over a period of 24 h at 25 ˚C, neither of these two signals was detected.
3. 8 mM, CH2Cl2 as solvent, rt. Relationship between Mn (●) [Mw/Mn (᭺)] of the polymer and conversion phenylporphyrin (1, X=Me), suggesting that the polymerization proceeded via dimethylaluminum enolate as the active species. In contrast, when the monomer was methyl methacrylate (MMA), the polymerization was terminated upon addition of Me3Al under similar conditions. For example, when 3 equiv of Me3Al with respect to 2 (R=Me) were added to the system ([MMA]0/[1 (X=Me)]0=100, 9% conversion), heat evolution, although observed at the very early stage, subsided within only 1–2 min.
2 Ring-Opening Polymerization of Epoxide with Various Aluminum Complexes as Initiators in the Presence of a Lewis Acid . . . . 3 “Immortal” Polymerization of Epoxide with Aluminum Porphyrin–Alcohol Systems in the Presence of a Lewis Acid . . 4 Lewis Acid Driven Anionic Polymerization of a Monomer with High Cationic Polymerizability: Ring-Opening Polymerization of Oxetane with Aluminum Porphyrin in the Presence of a Lewis Acid . . . . . . . . . . . . . . . . . 5 Ring-Opening Polymerization of Lactone with Aluminum Porphyrin in the Presence of a Lewis Acid .