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Polyaddition in miniemulsions: A new route to polymer dispersions
Author(s) -
Landfester Katharina,
Tiarks Franca,
Hentze HansPeter,
Antonietti Markus
Publication year - 2000
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/(sici)1521-3935(20000101)201:1<1::aid-macp1>3.0.co;2-n
Subject(s) - miniemulsion , dispersity , monomer , polymer chemistry , gel permeation chromatography , polymer , polymerization , chemistry , emulsion polymerization , aqueous solution , chemical engineering , materials science , organic chemistry , engineering
Polyaddition reactions in miniemulsions were successfully performed by miniemulsification of mixtures of di‐, tri‐, and tetra‐epoxides with varying diamines, dithiols, or bisphenols, and subsequent heating to 60°C. This expands the potential applications of the family of miniemulsification techniques to generate aqueous polymer dispersions, since miniemulsions were previously just employed for the radical polymerization of vinylic monomers. Depending on the chemical nature of the monomers, the amount of surfactant, and the pH of the reaction mixture, latex particles with diameters between 30 and 600 nm and sometimes very narrow particle size distributions were obtained. Gel permeation chromatography (GPC) measurements on the final polyaddition products reveal molecular weights of about 20 000 with a polydispersity index of close to 2, i. e., close to ideal reaction conditions are preserved throughout the heterophase reaction.