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- Title
Polarizer effect and structure of iodinated before and after casting poly(vinyl alcohol) film.
- Authors
Eun Joo Shin; Won Seok Lyoo; Yang Hun Lee
- Abstract
Poly(vinyl alcohol) (PVA)/iodine polarizing film was manufactured as follows: PVA iodinated in solution before casting (IBC film) and iodinated again after casting (IBC IAC film) and then the IBC IAC film was drawn in boric acid aqueous solution (IBC IAC polarizing film), to improve the durability of the polarizing film under a humid and warm atmosphere. These effects were examined by investigating the structural and optical properties of the IBC, IBC IAC, and IBC IAC polarizing films. In the IBC state, the PVA chain segments that combined boric acid and iodine were regarded as defects of the crystal, the formation of I3âdecreased with respect to weight gain of boric acid. In the IBC IAC state, the strength of the peak corresponding to I3âdecreased and the I5âpeak increased. The iodine ions penetrated into crystal of the IBC state during the IAC process and formed a new PVA/iodine complex crystal at the 2θ = 20° in the Xâray diffraction curves. In the IBC IAC polarizing film state, another type of polarizing film (IBC IAC polarizing filmâH) containing I3âions mainly was manufactured as well as the IBC IAC polarizing film to compare the effects of the I3âand I5âions on the durability of the polarizing films. The durability of the I3âions that were complexed with the PVA chain was higher than the I5âions, which could possibly be separated to I3âand I2. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
- Subjects
OPTICAL polarization; POLYVINYL alcohol; BORIC acid; X-ray diffraction; OPTICAL properties; POLARIZERS (Light)
- Publication
Journal of Applied Polymer Science, 2011, Vol 120, Issue 1, p397
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.33162