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Free-radical polymerization of styrene in worm-like micelles

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Abstract.

The solubilization of styrene in wormlike micelles of the cationic surfactant, cetyltrimethylammonium tosilate (CTAT), and its polymerization is examined here by UV spectroscopy, oscillatory rheometry, small angle X-ray scattering, polarizing light microscopy, and transmission electron microscopy. At low CTAT concentrations, the polymerization of styrene yields small and rigid rods in coexistence with wormlike micelles that form from the excess surfactant after the polymerization process. At high CTAT concentrations, polymeric rods (of large aspect ratio), spheroid polymer particles, and wormlike micelles coexist. The polymerization rate is second order, indicating that polymerization reactions end mainly by bimolecular termination.

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Acknowledgements.

This work was supported by the Consejo Nacional de Ciencia y Tecnología de México (Grants 38681-E and NC-204) and for the Spanish government through the Iberoamerica Scientific Cooperation Program. The authors thank the transmission electron microscopy technical support of Serveis Científico-Tècnics of the University of Barcelona and the technical assistance of Dr. Dámaso Navarro and Ms. Hortensia Maldonado of the Centro de Investigación en Química Aplicada (Saltillo, México) for the molar masses determinations.

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Authors and Affiliations

  1. Departamento de Ingeniería Química, CUCEI, Universidad de Guadalajara, Boul. M. García Barragán 1451, 44430, Guadalajara, Jal., Mexico

    F. Becerra, J. F. A. Soltero & J. E. Puig

  2. Departamento de Química, Universidad Nacional del Sur, 8000, Bahía Blanca , Argentina

    P. C. Schulz

  3. Departament deTecnologia de Tensoactius, Institut d’Investigacions Químiques i Ambientals de Barcelona, Consejo Superior de Investigaciones Científicas, C/Jordi Girona 18–26, 08033, Barcelona , Spain

    J. Esquena & C. Solans

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  1. F. Becerra
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  2. J. F. A. Soltero
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  3. J. E. Puig
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  4. P. C. Schulz
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  5. J. Esquena
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  6. C. Solans
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Correspondence to J. F. A. Soltero.

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Becerra, F., Soltero, J.F.A., Puig, J.E. et al. Free-radical polymerization of styrene in worm-like micelles. Colloid Polym Sci 282, 103–109 (2003). https://doi.org/10.1007/s00396-003-0917-y

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  • DOI: https://doi.org/10.1007/s00396-003-0917-y

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