Vinyl Polymerization. 431. Vinyl Polymerizations Initiated by Block and Random Poly(Styrene-co-Sodium Methacrylate) |
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| Authors: | Tatsuro Ouchi Hiroshi Sakamoto Yoshifumi Hosaka Minoru Imoto Tsutomu Iwamoto |
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| Institution: | 1. Department of Applied Chemistry Faculty of Engineering , Kansai University , Suita, Osaka, 564, Japan;2. Laboratory of Electron Microscopy , Osaka College of Pharmacy , Matsubara, Osaka, 580, Japan |
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| Abstract: | Abstract The polymerization of some kinds of vinyl monomer was found to occur without an ordinary initiator in aqueous solutions of AB-type block or random copolymers of sodium methacrylate with styrene as a so-called “uncatalyzed polymerization.” Although the spin trapping technique showed that the initiation mechanism by the block copolymer was the same as that by the random copolymer, the initiating ability of the block copolymer was lower than that of the random copolymer. Such results are attributable to the difference in the incorporating ability of monomer into the micelles formed by the block copolymer and into the hydrophobic areas formed by the random copolymer. |
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| Keywords: | polycondensates polyamides Yamazaki‐Higashi reaction chalcone oxyethyl segment |
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