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Colloid and Polymer Science

, Volume 294, Issue 3, pp 513–525 | Cite as

High molecular weight polyacrylamide nanoparticles prepared by inverse emulsion polymerization: reaction conditions-properties relationships

  • Y. Tamsilian
  • A. Ramazani S.A.
  • M. Shaban
  • Sh. Ayatollahi
  • R. Tomovska
Original Contribution

Abstract

High molecular weight polyacrylamide (PAM) nanoparticle dispersions are products with wide application possibilities, the most important of which is in petroleum industry such as drilling fluid and flooding agent in enhanced oil recovery. For that aim, it is necessary to achieve complete control of the final dispersion and polymer properties during the synthesis step. In this work, PAMs were synthesized by inverse emulsion polymerization of aqueous acrylamide solution in cyclohexane in the presence of emulsifier mixture of Span 20 and Span 80. We present a comprehensive study of the effects of variation of all important reaction conditions (agitation rate, reaction time and temperature, initiator type and concentration, emulsifier HLB ratio and its concentration, and water to oil ratio) on final monomer conversion, reaction kinetics, polymer intrinsic viscosity and molecular weight, particle size and distribution, and colloidal stability. Finally, the relationships between the reaction conditions and the polymer properties were developed, which allowed determination of the ranges of variation of reaction conditions for optimal PAM properties for the oil industry applications: high molecular weight and intrinsic viscosity, nanosized polymer particles with narrow particle size distribution, and improved colloidal stability of the final dispersions.

Keywords

Polyacrylamide nanoparticles Inverse emulsion polymerization Molecular weight Particle size Second virial coefficient Reaction kinetics 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

396_2015_3803_MOESM1_ESM.docx (271 kb)
ESM 1 (DOCX 271 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Institute for Nanoscience and Nanotechnology (INST)Sharif University of TechnologyTehranIran
  2. 2.Chemical and Petroleum Engineering DepartmentSharif University of TechnologyTehranIran
  3. 3.Institute for Polymer Material POLYMATUniversidad del País Vasco/Euskal Herriko Unvertsitatea (UPV-EHU)Donostia-San SebastianSpain
  4. 4.IKERBASCUE, Basque Foundation for ScienceBilbaoSpain

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