Living Cationic Polymerization Toward Macromolecular Design: Synthesis of End-Functional Multiarmed Polymers |
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| Authors: | Mitsuo Sawamoto Hajime Shohi Hiroe Sawamoto Hiroji Fukui Toshinobu Higashimura |
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| Institution: | 1. Institute of Isotopes of the Hungarian Academy of Sciences , H-1525, Budapest, P.O. Box 77, Hungary;2. Comiss[acaron]o Nacional de Energia Nuclear Instituto de Pesquisas Energéticas e Nucleares , IPEN/CNEN-SP, Sao Paulo, Brazil;3. Department of Material Development , Takasaki Radiation Chemistry Research Establishment JAERI , 1233 Watanuki, Gunma, 370-12, Japan;4. Department of Chemistry , Faculty of Engineering Gunma University Kiryu , Gunma, 376, Japan |
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| Abstract: | A series of multiarmed polymers with terminal functional groups have been synthesized on the basis of living cationic polymerizations of vinyl ethers and p-alkoxystyrenes. The syntheses were performed by two methods, one via living polymerizations with new multifunctional initiating systems followed by endcapping of the resultant multifunctional living polymers, and the other using designed silyl enol ethers as multifunctional terminators (coupling agents) that combine two to four end- functionalized linear living polymers. These two methodologies thus led to telechelic and 3- or 4-arm star polymers and macromonomers with hydroxyl, acetate, methacrylate, and styryl end functionalities. |
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