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Crosslinking of poly(vinyl acetate) nanolatices by gamma and UV radiation

Authors

  • Iván Meléndez-Ortiz,

    1. Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Ing. Enrique Reyna Hermosillo, # 140 Saltillo, Coahuila 25253, México
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  • Raúl Flores-Martínez,

    1. Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Ing. Enrique Reyna Hermosillo, # 140 Saltillo, Coahuila 25253, México
    2. Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Saltillo, Coahuila 25280, México
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  • Emilio Bucio,

    1. Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México D.F. 04510, México
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  • Gladis Cortez-Mazatán,

    1. Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Ing. Enrique Reyna Hermosillo, # 140 Saltillo, Coahuila 25253, México
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  • Hugo Martínez-Gutiérrez,

    1. Centro de Nanociencias y Nanotecnologías, Instituto Politécnico Nacional, Luis Enrique Erro s/n, Col. Zacatenco, Del. Gustavo A. Madero, México D. F. 07738, México
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  • René D. Peralta

    Corresponding author
    1. Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Ing. Enrique Reyna Hermosillo, # 140 Saltillo, Coahuila 25253, México
    • Departamento de Procesos de Polimerización, Centro de Investigación en Química Aplicada, Blvd. Ing. Enrique Reyna Hermosillo, # 140 Saltillo, Coahuila 25253, México
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Abstract

Poly(vinyl acetate) PVAc, in nanolatices with 10% polymer content, prepared by microemulsion polymerization was crosslinked by gamma and UV radiation. PVAc colloidal nanoparticles (average diameter, Dp = 58 nm) had Mw = 562,000 g/mol and about 95% conversions. PVAc nanolatices irradiated by gamma rays (1–13 kGy) at room temperature without crosslinking agent and by UV light (30–300 s exposure times) in the presence of divinylbenzene and allyl methacrylate showed crosslinking of up to 96% (high gel content), Dp < 100 nm and did not degrade as shown by FTIR spectroscopy. DSC and TGA characterization of irradiated PVAc samples indicated that Tg temperatures increased from 28°C for PVAc to 42°C and 39°C for UV and gamma rays crosslinked PVAc, respectively, whereas 10% weight losses occurred at 261°C for uncrosslinked PVAc and at 320 and 313°C for UV and gamma rays crosslinked PVAc. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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