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Long-term irradiation effects on gamma-irradiated Nylon 6,12 fibers

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Abstract

Long-term effects on Nylon 6,12 crystalline fibers irradiated six years ago have been determined, including chemical structure and morphology, and their relationship with storage time. Results from x-ray diffraction, small-angle x-ray scattering, scanning electron microscopy, and atomic force microscopy are reported for those fibers and for freshly irradiated ones. Some results for non-irradiated samples are included for comparison. Changes in the shape and size of the crystals (crystallinity degree) are found; the crystallite size increases with storage time. Both surface and bulk changes are seen in the morphology. Surface damage increases with storage time. Changes observed can be attributed to irradiation causing chain scission, which, in turn, causes crystal reorganization. The present results reinforce interpretation of earlier results obtained for concretes reinforced with irradiated Nylon fibers.

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Acknowledgment

Financial support of the National Council of Science and Technology of Mexico (CONACyT), Mexico City, by Grant No. 49899/2005 is acknowledged.

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Authors and Affiliations

  1. Centro de Investigación en Ingeniería y Ciencias Aplicadas (CIICAp), Universidad Autónoma del Estado de Morelos, Cuernavaca, 62210, Morelos, Mexico

    Carmina Menchaca-Campos & M.C. Resendiz

  2. Facultad de Química, Universidad Autónoma del Estado de México, Laboratorio de Investigación y Desarrollo de Materiales Avanzados (LIDMA), Km. 12 de la carretera Toluca-Atlacomulco, San Cayetano, 50200, Mexico

    Gonzalo Martínez-Barrera

  3. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Iztapalapa, 09340, México

    V.H. Lara

  4. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering, University of North Texas, Denton, Texas, 76203-5310, USA

    Witold Brostow

Authors
  1. Carmina Menchaca-Campos
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  2. Gonzalo Martínez-Barrera
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  3. M.C. Resendiz
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  4. V.H. Lara
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  5. Witold Brostow
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Correspondence to Carmina Menchaca-Campos.

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Menchaca-Campos, C., Martínez-Barrera, G., Resendiz, M. et al. Long-term irradiation effects on gamma-irradiated Nylon 6,12 fibers. Journal of Materials Research 23, 1276–1281 (2008). https://doi.org/10.1557/JMR.2008.0152

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  • DOI: https://doi.org/10.1557/JMR.2008.0152

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