Study of the Polyvinyl Alcohol-Borate-Iodine Complex II. Test Papers

Monte-Bovi, Anthony J.; Sciarra, John J.

doi:10.1002/jps.2600500304

Cited by 5 publications

(2 citation statements)

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“…Miyasaka [144] surveyed the structure and pro perties of the I 2 PVA complex. As early as 1961, MonteBovi and Sciarra [145] , PVA, and iodine: 1) test paper consisting of PVA and iodine for the qualita tive detection of boric acid and borates, and 2) test papers consisting of PVAboric acid and boric acidiodine for The color shift from blue to redviolet was seen even for low iodine concentrations when PVA was formalized (gen erating a formal linkage). In addition, the complex in the amorphous region was found to be stable in formalized PVA.…”

Section: Iodine-proteinic Fiber Complexesmentioning

confidence: 99%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

162

127

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A unique feature of molecular iodine by far, is its ability to bind to polymeric materials. A plethora of natural and synthetic polymers develop complexes when treated with molecular iodine, or with a mixture of mole cular iodine and potassium iodide. Many unexpected findings have been encountered upon complexation of iodine and the polymer skeleton, including the color formation, the polymer morphology changes, the compl exation sites or regions, the biological activity, and the electrical conductivity enhancement of the complexes, with poly iodides (I n¯) , mainly I 3¯ and I 5¯, as the actual binding species. Natural polymers that afford such complexes with iodine species are starch (amylose and amylopectin), chitosan, glycogen, silk, wool, albumin, cellulose, xylan, and natural rubber; iodinestarch being the oldest iodinenatural polymer complex. By contrast, numerous synthetic polymers are prone to make com plexes, including poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), nylons, poly(Schiff base)s, poly aniline, unsaturated polyhydrocarbons (carbon nano tubes, fullerenes C 60 /C 70 , polyacetylene; iodinePVA being the oldest iodinesynthetic polymer complex.

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Section: Iodine-proteinic Fiber Complexesmentioning

confidence: 99%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

162

127

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“…classified

{normalI}_{3}^{-}

adducts into two types: (1) I−I 2 adducts, which have a linear asymmetric geometry with one strong I–I bond and one weak I·I bond, and (2) a covalent I–I–I complex with a linear symmetric geometry with two equivalent I–I bonds. It has been reported that the bands of

{normalI}_{5}^{-}

(λ max = 620 nm) could not be found in the solution state without a polymer matrix, such as a starch, cellulose derivatives, a protein–fiber complex, or PVA . So, there is still little information about the formation conditions for these bands.…”

Section: Resultsmentioning

confidence: 99%

Color change of an iodinated poly(vinyl alcohol) film by physical deformation

Kim

2015

J of Applied Polymer Sci

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The color change of an iodinated poly(vinyl alcohol) (PVA) film caused by physical deformation was investigated in this study. The color of a PVA film soaked in an aqueous potassium iodide (KI)/I 2 solution was light yellow, but it turned light blue when the film was physically deformed. The ultraviolet-visible absorption spectrum of the iodinated PVA film extended uniaxially in air was measured at various extension levels. Without deformation, the film showed UV absorption bands at 210, 290, and 360 nm. However, under deformation, the film showed new visible light absorption bands at 440 and 620 nm. From the UV-vis absorption spectra of several iodinated solutions, we found that the absorption wavelength of iodine was affected by the cohesive energy of the solvents. The KI/I 2 diethyl ether solution showed an absorption band at 460 nm, and this provided a clue to understanding the color change of the PVA-iodine complexes caused by physical deformation.

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Bor und spezielle Borverbindungen

Kliegel¹

1980

BOR in Biologie, Medizin Und Pharmazie

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Study of the Polyvinyl Alcohol-Borate-Iodine Complex II. Test Papers

Cited by 5 publications

References 1 publication

Molecular iodine/polymer complexes

Molecular iodine/polymer complexes

Color change of an iodinated poly(vinyl alcohol) film by physical deformation

Bor und spezielle Borverbindungen

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