Colloid and Polymer Science

, Volume 271, Issue 2, pp 114–123 | Cite as

Comparison of oil-soluble and water-soluble initiation of styrene polymerization in a three-component microemulsion

  • J. E. Puig
  • V. H. Pérez-Luna
  • M. Pérez-González
  • E. R. Macías
  • B. E. Rodríguez
  • E. W. Kaler
Original Contributions


The polymerization of styrene in three-component oil-in-water microemulsions made with the cationic surfactant dodecyltrimethylammonium bromide is studied by dilatometry and quasielastic light scattering as a function of type and concentration of initiator. Fast polymerization rates, high conversions, and high molecular weight polymers are achieved with both oil-soluble (AIBN) and water-soluble (potassium persulfate) initiators. The rate of polymerization shows initiation and termination intervals, but no constant-rate interval is observed. Stable monodisperse microlatexes are obtained with both types of initiators. For both AIBN and potassium persulfate, polystyrene molecular weight is proportional to initiator concentration [I]−0.4 and particle radii decrease as [I]−0.2. Polymerization initiation occurs in or at the microemulsion droplets, and polymer particles grow by recruiting monomer and surfactant from uninitiated swollen micelles.

Key words

Styrene polymerization latex microemulsion polystyrene 


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Copyright information

© Steinkopff-Verlag 1993

Authors and Affiliations

  • J. E. Puig
    • 1
  • V. H. Pérez-Luna
    • 1
  • M. Pérez-González
    • 1
  • E. R. Macías
    • 1
  • B. E. Rodríguez
    • 2
  • E. W. Kaler
    • 2
  1. 1.Facultad de Ciencias QuimicasUniversidad de GuadalajaraGuadalajaraMéxico
  2. 2.Department of Chemical EngineeringUniversity of DelawareUSA

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