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Effect of tertiary diamines on anionic polymerization of polar vinyl monomers
Author(s) -
Marchal Jérǒme,
And Yves Gnanou,
Fontanille Michel
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961070105
Subject(s) - reactivity (psychology) , sparteine , monomer , polymer chemistry , polymerization , methacrylic acid , lithium (medication) , chelation , pyridine , anionic addition polymerization , chemistry , materials science , organic chemistry , polymer , medicine , alternative medicine , pathology , endocrinology
Tertiary diamines that exhibit chelating capability to lithium are shown to decrease the reactivity of growing species when used in classical anionic polymerization of methacrylic monomers. Out of the different diamines investigated, sparteine turns out to be the most efficient chelating agent. The beneficial effect of the latter additives on the overall reactivity of methacrylic anions was exploited to prepare poly(MMA) samples of controlled size at room temperature. The decrease in reactivity was also demonstrated from a kinetic point of view, upon measuring the actual rate constant of propagation using vinyl pyridine as model monomer.