By Shiro Kobayashi, Helmut Ritter, David Kaplan, D.L. Kaplan, S. Kobayashi, S. Matsumura, M. Ohmae, M. Reihmann, Ajay Singh, H. Uyama, P. Xu
Content material: Cationic polymerization of olefins with alkylaluminium initiators / J.P. Kennedy and J.K. Gillham -- Polymere aus Nitrilen / D. Wöhrle -- Zur Thermodynamik der enthalpisch und der entropisch bedingten Entmischung von Polymerlösungen / B.A. Wolf -- Chemical synthesis and houses of ploysaccharides of biomedical curiosity C. Schuerch
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Extra resources for Enzyme-Catalyzed Synthesis Of Polymers
42 M. Reihmann · H. Ritter Scheme 24 Hematin-catalyzed polymerization of ethylphenol (EP) Another compound which has been found to somewhat imitate the active site of peroxidases is the commercially available Fe(II)-salen catalyst. This catalyst was used successfully to produce phenol polymers, which could be of interest for industrial production [153, 154]. For example, cardanol can be polymerized by the Fe(II)-salen catalyst . Due to the unsaturated bonds in the side chain of the cardanol components, the resulting polymers could be thermally cured, or cured by use of cobalt naphthenate to give brilliant ﬁlms with a high-gloss surface.
Dec J, Bollag JM (1991) Arch Environ Contam Toxicol 29:1561 74. Reihmann MH, Ritter H (2001) Macromol Biosci 1:85 75. Liu W, Cholli AL, Kumar J, Tripathy S, Samuelson L (2001) Macromolecules 34:3522 76. Sahoo SK, Liu W, Samuelson LA, Kumar J, Cholli AL (2002) Macromolecules 35:9990 77. Mejias L, Reihmann MH, Sepulveda-Boza S, Ritter H (2002) Macromol Biosci 2:24 78. Akkara JA, Senecal KJ, Kaplan DL (1991) J Polym Sci A Polym Chem 29:1561 79. Ayyagari M, Akkara JA, Kaplan DL (1998) In: Gross RA, Kaplan DL, Swift G (eds) ACS Symp Ser: enzymes in polymer synthesis, vol 684.
Higher-substituted two-ring structures have also been investigated. The polymerization of 8-hydroxyquinoline-5-sulfonate (98) was studied by in situ NMR spectroscopy . The change of the resonances of the ﬁve observable protons allowed the use of NMR to follow directly which sites of the monomer participated in the oxidative coupling during the polymerization. Positions 2, 4, and 7 were the preferred sites for the polymerization. The lower preference for position 4 can be ascribed to the steric hindrance posed by the sulfonate group.