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High‐temperature redox‐initiated emulsion polymerization of butadiene
Author(s) -
Padwa Allen R.,
Paster Mark D.
Publication year - 1982
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.1982.070270427
Subject(s) - emulsion polymerization , redox , ionic strength , polymerization , reaction rate constant , kinetics , limiting , chemistry , ferric , emulsion , polymer chemistry , particle size , particle (ecology) , constant (computer programming) , analytical chemistry (journal) , thermodynamics , inorganic chemistry , aqueous solution , polymer , organic chemistry , mechanical engineering , physics , oceanography , quantum mechanics , computer science , engineering , programming language , geology
The kinetics of the ferric ethylenediaminetetraacetate (EDTA)–diisopropylbenzene hydroperoxide (DIBHP)‐sodium formaldehyde sulfoxylate (SFS) redox system were determined. The rate constant is a function of the ionic strength μ. A plot of log 10 (rate constant), for the rate‐limiting second‐order iron—SFS reaction, vs.μ 1/2 has a slope of 1.3 with a limiting rate constant of 295 ± 15 L. mol −1 . min −1 at μ = 0. The slope of this plot decreases to essentially zero for μ > 0.06 M . Incorporation of these results into the Smith‐Ewart model for emulsion polymerization correctly predicts the dependence of latex particle size on Fe and DIBHP concentration, but a much lower dependence on SFS concentration is observed.