Role of adsorbed iodine into poly(vinyl alcohol) films drawn in KI/I2 solution |
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| Authors: | Tsukasa Miyazaki Shigeru Katayama Yoshihiro Tsuji |
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| Affiliation: | a Core Technology Center, Nitto Denko Corporation, 1-1-2, Shimohozumi, Ibaraki, Osaka 567-8680, Japan
b Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan |
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| Abstract: | We have investigated the microstructure of the poly(vinyl alcohol) (PVA) films using small- and wide-angle X-ray scattering (SAXS and WAXS, respectively) techniques. The samples were uniaxially drawn in water or KI/I2 aqueous solution and then dried in an air-oven at 333 K for 1 h prior to SAXS and WAXS measurements. It was found that for the films drawn in KI/I2 solution PVA chains in the microfibrillar structure are more extended upon the film drawing compared to the case of the films drawn in pure water, which is resulted from the correlation function analysis on the SAXS data. Adsorbed iodines into the film were anticipated to act as junction points between the microfibrils via the formation of the PVA-iodine complexes. |
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| Keywords: | Poly(vinyl alcohol) Small-angle X-ray scattering Wide-angle X-ray scattering |
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