1982
DOI: 10.1002/actp.1982.010331102
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Beiträge zum Mechanismus der anionisch initiierten Acrylnitrilpolymerisation. II. Zur Ausbildung verzweigter Strukturen von im Strömungstrohr hergestellten Acrylinitrilpolymeren

Abstract: Die im Stromungsrohr durch anionische Initiierung unter Verwendung des Systems Dimethylformamid/Lithium-tbntoxid hergestellten Acrylnitrilpolymere wurden durch Lichtstreuung, Membranosmometrie, Viskosimetrie und 1%-NMR-Spektroskopie charakterisiert. Es liegen sowohl lang-als auch kurzkettenverzweigte Strukturen vor, die durch eine inter-bzw. intramolekulare Protonenubertragungsreaktion vom a-C-Atom erklart werden. BKaaabc n' ~exanuancy anuonno-unuyuupoeannoii noau&epu.?ayuu aKpunonumpu.aa. I I . 0 $opncupoeanu… Show more

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“…Erusallimsky et al 4 proposed the cyclic terminal structure formed by intramolecular attack of carbanion against cyano group in penpenultimate monomer unit. Galin et al 8 and Malsch et al 9 indicated from the data of hydrodynamic property that branches exist in PAN chain when prepared in anionic polymerization system. To explain the mechanism of formation of these structures, Malsch et al 9 proposed intramolecular and intermolecular chain transfer reactions to polymer.…”
mentioning
confidence: 99%
“…Galin et al 8 and Malsch et al 9 indicated from the data of hydrodynamic property that branches exist in PAN chain when prepared in anionic polymerization system. To explain the mechanism of formation of these structures, Malsch et al 9 proposed intramolecular and intermolecular chain transfer reactions to polymer. Joh 10 indicated that the cyclic imine structure suggested by Ottolenghi and Zilkha 7 became an acid amide by hydrolysis reaction through the addition of hydrochloric acid as a terminator in case of the polymerization of methacrylonitrile.…”
mentioning
confidence: 99%
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How this paper cites the one you are viewing
“…Erusallimsky et al 4 proposed the cyclic terminal structure formed by intramolecular attack of carbanion against cyano group in penpenultimate monomer unit. Galin et al 8 and Malsch et al 9 indicated from the data of hydrodynamic property that branches exist in PAN chain when prepared in anionic polymerization system. To explain the mechanism of formation of these structures, Malsch et al 9 proposed intramolecular and intermolecular chain transfer reactions to polymer.…”
mentioning
confidence: 99%
“…Galin et al 8 and Malsch et al 9 indicated from the data of hydrodynamic property that branches exist in PAN chain when prepared in anionic polymerization system. To explain the mechanism of formation of these structures, Malsch et al 9 proposed intramolecular and intermolecular chain transfer reactions to polymer. Joh 10 indicated that the cyclic imine structure suggested by Ottolenghi and Zilkha 7 became an acid amide by hydrolysis reaction through the addition of hydrochloric acid as a terminator in case of the polymerization of methacrylonitrile.…”
mentioning
confidence: 99%