Theoretical and experimental investigations of the inverse emulsion polymerization of acrylamide

Abdi, A ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1002/app.41916
  3. Publisher: John Wiley and Sons Inc , 2015
  4. Abstract:
  5. In this study, the inverse emulsion polymerization modeling of polyacrylamide with population balance equations (PBEs) was performed. The PBEs were derived on the basis of the zero-one kinetic model. The effects of the surfactant steric barrier and surfactant reaction with radicals, including monomeric radicals, on the radical entry rate into the particle were taken into account. In the modified model, the coagulation phenomenon was included through consideration of the effects of forces not included in the Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory; these include hydration and steric forces in addition to DLVO forces. The effects of the surfactant and initiator concentrations on the conversion, particle size, and average molecular weight (MW) were investigated by simulation and experimental studies. Increasing the surfactant concentration initially increased the conversion and decreased MW. A further increase in the surfactant concentration resulted in a decrease in the conversion and an increase in MW. The average particle size decreased with an increase in the surfactant concentration. An increase in the initiator concentration led to an increase in the monomer conversion and a decrease in the average MW
  6. Keywords:
  7. Modeling ; Polyacrylamide ; Acrylic monomers ; Coagulation ; Emulsification ; Emulsion polymerization ; Models ; Particle size ; Polyacrylates ; Polymers ; Average molecular weight ; Derjaguin , Landau , Verwey , and Overbeek ; Experimental investigations ; Initiator concentration ; Inverse emulsion polymerization ; Population balance equation ; Steric barrier ; Surfactant concentrations ; Surface active agents
  8. Source: Journal of Applied Polymer Science ; Volume 132, Issue 22 , February , 2015 ; 00218995 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/app.41916/abstract;jsessionid=14D9539DD26669D5FC54759CFD21170C.f01t01