Changes in orientation caused by UV irradiation of nylon 6 fibers
Corresponding Author
I. M. Fouda
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt===Search for more papers by this authorH. M. Shabana
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt
Search for more papers by this authorF. M. El-Sharkawy
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt
Search for more papers by this authorCorresponding Author
I. M. Fouda
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt===Search for more papers by this authorH. M. Shabana
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt
Search for more papers by this authorF. M. El-Sharkawy
Department of Physics, Faculty of Science, University of Mansoura, Mansoura, Egypt
Search for more papers by this authorAbstract
The effect of UV radiation on the structural parameters that relate to the optical properties of nylon 6 fibers are investigated using interferometry. When the optical parameters are known, we can use them to calculate various orientation functions given by Hermans and de Vries. The properties of concern are the surface reflectivity, transparency, stress optical coefficient, stress due to UV irradiation, optical configuration parameter, segment anisotropy, dielectric constant, and susceptibility. The number of molecules per unit volume, isotropic refractive index, polarizability of a monomer unit, specific refractivity of the dielectric (along and across the fiber axis) and the form birefringence were obtained. The results are established by relationships designed to relate the calculated structural parameters to the time of exposure. The study demonstrates how the structural parameters change during exposure to UV radiation. Illustrations are given using graphs and microinterferograms. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 3202–3211, 2003
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