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Evaluation of the Form Birefringence and Other Structural Parameters Due to Thermal Annealing for Nylon 6 Fibers

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Abstract

In the present work nylon 6 fibers were annealed at 155±1 ○C at different times and allowed to cool down in the oven to room temperature (27±1 ○C). A Pluta polarizing interference microscope was used for measuring the changes in the optical parameters. From the optical and density parameters the optical orientation values of F 2(Θ), F 4(Θ), F 6(Θ) and F av were calculated. Also, the dielectric constant, dielectric susceptibility, molar refractivity, segment anisotropy, optical stress coefficient, optical configuration and the form birefringence were evaluated. The segment anisotropy and deformational thermal stress was evaluated. Relationships between the measured and calculated parameters are given for illustration. The mechanism of structural variations for nylon 6 fiber due to the annealing process is discussed, and structural details for opto thermal parameters are explained. The present study throws light on the changes due to thermal annealing conditions for nylon 6 fibers. Microinterferograms and curves are given for illustration.

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  1. Department of Physics, Faculty of Science, University of Mansoura, Mansoura, 35516, Egypt

    I. M. Fouda

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Fouda, I.M. Evaluation of the Form Birefringence and Other Structural Parameters Due to Thermal Annealing for Nylon 6 Fibers. Journal of Polymer Research 9, 37–44 (2002). https://doi.org/10.1023/A:1020667004572

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