Abstract
Pre-treatment of poly (ethylene terephthalate) (PET) fibres with a strongly interacting solvent (dimethylformamide (DMF)) induces variation in the fibre structure and improves its optical anisotropy. As a result, variations in the optical properties have been demonstrated. The values for refractive indices in the two principal vibration directions, along and across the fibre axis, and birefringence values are obtained using the two-beam interference Pluta microscope. They increase with increase in time of both solvent and thermal treatments. Increases in the crystallinity values with the time of thermal treatment have been reported. Optical and structural parameters such as mean polarizability per unit volume, molar refractivity and surface reflectivity have been also calculated. The resultant parameters reflect good effect of the solvent and thermal treatments on the molecular orientation in PET fibres. Illustration can been given by graphs and microinterferograms.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
