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A tracer study of the persulfate–bisulfite‐catalyzed polymerization of acrylonitrile
Author(s) -
Tsuda Y.
Publication year - 1961
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1961.070051316
Subject(s) - acrylonitrile , polymerization , persulfate , bisulfite , chemistry , redox , aqueous solution , sulfonate , catalysis , sodium bisulfite , polymer chemistry , polymer , organic chemistry , copolymer , biochemistry , dna methylation , gene expression , gene , sodium
A tracer study has been made of the polymerization of acrylonitrile in an aqueous solution at 25°C with the use of radioactive K 2 S 35 2 O 8 and NaHS 35 O 3 in a redox catalyst system. Persulfate and bisulfite give sulfate and sulfonate endgroups, respectively. The contents of these endgroups in the polymer were determined and the following empirical equation was derived:\documentclass{article}\pagestyle{empty}\begin{document}$ \frac{{[{\rm Sulfonate endgroups]}}}{{[{\rm Sulfate endgroups]}}} = 1 + 0.27\left\{ {\frac{{[{\rm NaHSO}_{\rm 3} ]}}{{[{\rm AN] [K}_{\rm 2} {\rm S}_{\rm 2} {\rm O}_{\rm 8} ]}}} \right\}^{1.5} $ \end{document} Sulfonate is the major endgroup under every condition of polymerization. A tentative discussion of the polymerization initiation reaction in this redox system is given in order to account for the above experimental results.