An experimental investigation is reported in which morphology of polyethylene terephthalate (PET) crystals obtained by solvent-induced crystallization (SINC) was studied. Although a total of 20 solvents were investiga...
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An experimental investigation is reported in which morphology of polyethylene terephthalate (PET) crystals obtained by solvent-induced crystallization (SINC) was studied. Although a total of 20 solvents were investigated, the solvents of dioxane, aniline, nitromethane, and methanol were chosen specifically for the detailed studies. The following techniques were used in the program - small-angle light scattering (SALS), optical and scanning electron microscopy, diffusion studies, and X-ray diffraction (both wide angle (WAXS), and small angle (SAXS), as well as stress-strain measurements. From this study, it has been established that the SINC of undeformed PET leads to the inducement of anisotropic spherulitic structure which develops rapidly, in comparison with the diffusion rate of the solvent through the polymer. While the rate of solvent diffusion can be enhanced by increasing the SINC temperature, the size of the resulting spherulites does not seem to be influenced significantly.
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