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Semicontinuous heterophase polymerization of methyl methacrylate in the presence of reactive surfactant HITENOL BC10

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Abstract

Semicontinuous heterophase polymerization was used to copolymerize methyl methacrylate (MMA) with reactive surfactant HITENOL BC10 (HBC10) at 60 °C using sodium dodecyl sulfate as pre-stabilizing agent and potassium persulfate as initiator. The mixture of MMA and HBC10 was added at constant rate in continuous mode varying the MMA/HBC10 ratio. High-polymerization rates were observed, decreasing as the MMA/HBC10 ratio decreased. Latexes with polymer content near 20% and polymer to surfactant (P/S) weight ratios between 5 and 15 were obtained. Particle sizes distribution were bimodal in all cases with a tendency to be monomodal as HBC10 concentration increased which was ascribed to enhanced particle stabilization by the presence of HBC10. The average particle diameters at the end of polymerizations for the first and second populations were around 10 and 50 nm, respectively. Very high average molecular weights were observed (1.4 × 106 ≤ M w  ≤ 2.1 × 106 g/mol), which decreased when HBC10 concentration increased. The corresponding polydispersity indexes (M w /M n ) were in the range of 1.45–2.24.

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Acknowledgments

This study was supported by the Consejo Nacional de Ciencia y Tecnología, México (grant # SEP-80843). The technical assistance of Gladys Y. Cortez-Mazatán (CIQA) for particle size determination is appreciated. HMG wants to thanks to Claudia J. Torres-Ramos and Luis Moreno (Centro de Nanociencias y micro y nanotecnologías, IPN) for their help in Raman analysis.

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Authors and Affiliations

  1. Departamento de Ingeniería Química, Coordinación Académica Región Altiplano (COARA), Universidad Autónoma de San Luis Potosí, Carretera a Cedral KM 5+600, San José de las Trojes, 78700, Matehuala, San Luis Potosí, Mexico

    Víctor M. Ovando-Medina, Piedad S. Piña-García, Miguel A. Corona-Rivera & Paola E. Díaz-Flores

  2. Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna 140, 25253, Saltillo, Coahuila, Mexico

    René D. Peralta

  3. Centro de Nanociencias y micro y nanotecnologías, Instituto Politécnico Nacional, Luis Enrique Erro S/N, 07738, Mexico, DF, Mexico

    Hugo Martínez-Gutiérrez

  4. Centro de Investigación en Materiales Avanzados, S.C., Alianza Norte 202, Parque de Investigación e Innovación Tecnológica, 66600, Apodaca, NL, Mexico

    Tania E. Lara-Ceniceros

Authors
  1. Víctor M. Ovando-Medina
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  2. Piedad S. Piña-García
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  3. Miguel A. Corona-Rivera
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  4. Paola E. Díaz-Flores
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  6. Hugo Martínez-Gutiérrez
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  7. Tania E. Lara-Ceniceros
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Correspondence to Víctor M. Ovando-Medina.

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Ovando-Medina, V.M., Piña-García, P.S., Corona-Rivera, M.A. et al. Semicontinuous heterophase polymerization of methyl methacrylate in the presence of reactive surfactant HITENOL BC10. Polym. Bull. 68, 2313–2322 (2012). https://doi.org/10.1007/s00289-012-0726-x

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  • DOI: https://doi.org/10.1007/s00289-012-0726-x

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