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

Published online by Cambridge University Press:  31 January 2011

Carmina Menchaca-Campos ,
Gonzalo Martínez-Barrera ,
M.C. Resendiz ,
V.H. Lara  and
Witold Brostow
Carmina Menchaca-Campos*
Affiliation:
Centro de Investigación en Ingeniería y Ciencias Aplicadas (CIICAp), Universidad Autónoma del Estado de Morelos, Cuernavaca 62210, Morelos, Mexico
Gonzalo Martínez-Barrera
Affiliation:
Laboratorio de Investigación y Desarrollo de Materiales Avanzados (LIDMA), Facultad de Química, Universidad Autónoma del Estado de México, Km. 12 de la carretera Toluca-Atlacomulco, San Cayetano 50200, Mexico
M.C. Resendiz
Affiliation:
Centro de Investigación en Ingeniería y Ciencias Aplicadas (CIICAp), Universidad Autónoma del Estado de Morelos, Cuernavaca 62210, Morelos, Mexico
V.H. Lara
Affiliation:
Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Iztapalapa 09340, México
Witold Brostow
Affiliation:
Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76203-5310
*
a)Address all correspondence to this author. e-mail: ecmenchaca@yahoo.com.mx
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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.

Keywords

Crystal growthPolymerRadiation effects
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 5 , May 2008 , pp. 1276 - 1281
Copyright
Copyright © Materials Research Society 2008

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References

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