Premium
Emulsion Polymerization of a Sugar Derivative–Kinetic Studies and Properties of the Sugar Latexes
Author(s) -
Koch Ulrich,
Yaacoub EmileJoseph
Publication year - 2003
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.200390046
Subject(s) - emulsion polymerization , chemistry , polymerization , polymer chemistry , particle size , ionic strength , radical polymerization , sodium dodecyl sulfate , chromatography , polymer , organic chemistry , aqueous solution
Free‐radical batch‐emulsion polymerization of 3‐ O ‐methacryloyl‐1,2:5,6‐di‐ O ‐isopropylidene‐ α ‐ D ‐glucofuranose (3‐MDG) initiated by a water‐soluble initiator (potassium peroxodisulfate, KPS), in the presence of an ionic emulsifier (sodium dodecyl sulfate, SDS), was investigated at 60 °C. The effect of the emulsifier and initiator concentration on the reaction kinetics and on the colloidal and molecular properties of the sugar latexes was studied. It was found that the rate of polymerization over interval II is proportional to the concentration of the initiator and the emulsifier raised to the power of 0.40 and 0.68, respectively. The particle size decreased and the number of particles increased with increasing either SDS or KPS concentration. The average value of the propagation rate constants of polymerization ( k p ) for 3‐MDG was found to be 257 L · mol −1 · s −1 . The weight‐average molecular weights also increased with increasing the emulsifier concentration. The sugar latexes exhibit a high glass transition temperature ( T g ) of 167 °C.Effect of SDS concentration on the average number of particles ( N p ) and the weight‐average molecular weight ( M w ).