Particle coagulation at semicontinuous emulsion polymerization. II. Characterization of surface groups
Article first published online: 9 MAR 2003
Copyright © 1979 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 24, Issue 4, pages 915–921, 15 August 1979
How to Cite
Šňupárek, J. and Tuťálková, A. (1979), Particle coagulation at semicontinuous emulsion polymerization. II. Characterization of surface groups. J. Appl. Polym. Sci., 24: 915–921. doi: 10.1002/app.1979.070240404
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 1 OCT 1978
Semicontinuous emulsion polymerization of acrylic monomers with a monomer emulsion feed has been investigated. The amount of coagulum appearing during the polymerization under conditions of insufficient covering of particle surface by emulsifier was studied from the point of view of particle surface charge. Increasing the surface group concentration via copolymerization of butyl acrylate with acrylic acid or sulfoethyl methacrylate caused increased colloid stability of the system and a rapid decrease in coagulum formation. It was established that during the polymerization acid hydrolysis of ester groups took place, which caused an increase in the carboxyl groups concentration at the particle surface. These carboxyl groups contribute to the colloid stability of the polymerizing system.