Im. Fouda et al., OPTOTHERMAL PROPERTIES OF FIBERS .10. TEMPERATURE-DEPENDENCE OF THE SKIN-CORE STRUCTURE OF NYLON-6 FIBERS, Journal of applied polymer science, 66(4), 1997, pp. 695-709
Refractive indices and birefringence for skin and core changes with an
nealing, produced by different annealing conditions in nylon-6 fibers,
were measured interferometrically. Applications were carried out usin
g multiple-beam Fizeau fringes in transmission to determine Cauchy's c
onstants and dispersive coefficients for the fibers. The resulting dat
a were used to calculate the polarizability per unit volume for each l
ayer. By optical microscopy, the geometrical parameters of the fiber c
ross section were found. The effect of temperature and time of anneali
ng on the refractive index and birefringence for each layer were also
investigated. The relationships between temperature and time of anneal
ing with the optical parameters were drawn. Illustrations are given us
ing microinterferograms and curves. (C) 1997 John Wiley & Sons, Inc.