| Autor: |
Rozenberg, Boris A., Estrin, Yakov I., Estrina, Genrietta A. |
| Předmět: |
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| Zdroj: |
International Journal of Polymer Analysis & Characterization; Jul/Aug2004, Vol. 9 Issue 4, p197-212, 16p, 6 Diagrams, 7 Graphs |
| Abstrakt: |
Anionic polymerization of 2-hydroxyethylacrylate (HEA) and 2-hydroxyethylmethacrylate (HEMA) proceeding with formation of heterochain ether-ester oligomers was studied. Functionality type distribution of oligomers was characterized by liquid chromatography under conditions close to critical ones. Presence of macromolecules having different kinds of end groups (two acrylate, one acrylate and one hydroxyl, two hydroxyl groups on a molecule), as well presence of cyclic molecules was shown in oligomers. This fact indicates existence of intensive interchain exchange reactions in the course of polymerization. The possibility of carbon chain fragment formation was shown also. The mechanism of side reactions resulting in redistribution of functional end groups over macromolecules is revealed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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