Abstract
With the aid of the Mach–Zehnder interferometer, the drawability of polypropylene fibres (PP) was optically studied. The effect of varying the intensity of He–Ne laser on PP opto-mechanical properties was investigated. The state of polarization of the used laser was found to influence the optical and mechanical properties of PP fibres, such as the refractive index, elongation at break, work of rupture and the stress–strain curves. As a key finding, it is found that the PP fibres break at different draw ratios when the state of polarization is changed from 0° to 90°.
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Acknowledgements
The authors would like to express their gratitude to Professor T. Z. N. Sokkar for his useful discussions. The authors are grateful for the BIAS (Bremer Institut für Angewandte Strahltechnik, Germany), the developer of the fringe processor programme.
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Shams El-Din, M.A., El-Tawargy, A.S. Interferometric study of the effect of laser intensity and polarization on the cold-drawing of virgin polypropylene fibres. Indian J Phys 91, 1425–1435 (2017). https://doi.org/10.1007/s12648-017-1044-9
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DOI: https://doi.org/10.1007/s12648-017-1044-9