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The manganic hydroxide–hydrazine system as an initiator of vinyl polymerization. II. The emulsion polymerization of methyl methacrylate
Author(s) -
Brown C. W.,
Longbottom H. M.
Publication year - 1970
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.1970.070141201
Subject(s) - hydrazine (antidepressant) , polymerization , methyl methacrylate , polymer chemistry , emulsion polymerization , chemistry , bulk polymerization , monomer , hydrate , hydroxide , radical polymerization , organic chemistry , polymer , chromatography
The reaction between hydrazine hydrate and manganic hydroxide has been studied as an initiator for the emulsion polymerization of methyl methacrylate. The system has proved to be effective, and polymerization occurs at favorable rates over a wide temperature range extending from below 10°C to over 50°C. The pH range, however, is rather limited, the most effective value being 9. The main features of the initiator's behavior are similar to those found previously in the corresponding solution polymerization and are explained on the basis of a surface reaction between the hydrazine and the insoluble hydroxide. A complicating feature is the reaction between hydrazine and monomer, which exerts an inhibiting influence.