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Effects of Laplace Pressure on Propagation and Termination in Aqueous Heterogeneous Free Radical Polymerization
Author(s) -
Zetterlund Per B.,
Okubo Masayoshi
Publication year - 2006
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.200500051
Subject(s) - laplace pressure , laplace transform , aqueous solution , polymerization , radius , kinetics , thermodynamics , chemistry , particle (ecology) , polymer , emulsion polymerization , radical polymerization , polymer chemistry , materials science , organic chemistry , physics , mathematics , classical mechanics , mathematical analysis , surface tension , oceanography , computer security , computer science , geology
Summary: The influence of the Laplace pressure in polymer emulsion particles during aqueous heterogeneous free radical polymerization on the polymerization kinetics has been investigated. Calculations were carried out based on experimentally reported pressure dependences of propagation and termination rate coefficients. The results suggest that in most cases the effects are not likely to be significant, although under conditions of very small particles (diameter <20 nm) and high interfacial tensions effects of the order of a few percent on propagation (increase in rate) and termination (decrease in rate) were predicted.( k p / k t 0.5 )/( k p / k t 0.5 ) 0 as a function of particle radius as a result of the Laplace pressure.