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Radical Polymerization of Alkali Acrylates in Aqueous Solution
Author(s) -
Drawe P.,
Buback M.,
Lacík I.
Publication year - 2015
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201500075
Subject(s) - polymerization , chemistry , alkali metal , aqueous solution , ionic polymerization , polymer chemistry , radical polymerization , rubidium , acrylic acid , solution polymerization , monomer , anionic addition polymerization , inorganic chemistry , potassium , organic chemistry , polymer
Monomer conversion versus time profiles for the radical polymerization of ionized acrylic acid (AA), 0.6 to 0.8 mol L −1 in aqueous solution, are measured at 50 °C via inline near‐infrared spectroscopy mostly on fully ionized AA, i.e., of alkali acrylates. Ionization reduces polymerization rate with the size of this effect being dependent on the type and on the concentration of the alkali counter cation, which is varied from lithium to rubidium. Polymerization rate becomes very small upon shielding the cation by complexation, whereas an enhancement of cation concentration, by addition of alkali chloride, may enhance polymerization rate such as to even reach the high rates observed with the radical polymerization of nonionized AA.