Estimation of crystalline and amorphous regions is very interesting for absorptivity of pigments, humidity, and chemical reactions. In addition, the performance behavior of textile materials depends on a complex interaction of their basic mechanical properties, such as tensile, bending, and shear characteristics. Therefore, the present work deals with the study of the variation of crystallinity and amorphosity of dralon fabric exposed to ultraviolet (UV) light irradiation for periods ranging from 0 to 120 h using the X-ray diffraction (XRD) technique. The radiation-induced changes in the optical properties of the fabric, which in turn reflect the damaged sites in the irradiated fabric, were also evaluated using spectrophotometric analysis, and the obtained results are discussed in relation to the mechanical properties of dralon fabric, such as tensile strength and percentage elongation at break. The results indicate changes in crystallinity, tensile strength, and elongation percentage at break, besides variations in optical properties of dralon fabric after exposure to UV light. These changes may be attributed to the variation caused in the macro- and micromolecular structure of the fabric network due to UV irradiation.
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Nabawia A. El-Zaher (2001) studied this question.
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