Poly(vinyl alcohol)/heteropolyacid nanocomposites as new materials for radiochromic dosimetry in radiation processing

2021 ◽  
Author(s):  
Oleg N. Tretinnikov ◽  
Natalya I. Sushko ◽  
Anastasia V. Protosovskaya ◽  
Artsiom V. Radkevich ◽  
Eryk I. Pavalanski
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
New Materials ◽  
Radiation Processing

Synthesis of nanocomposites: Organoceramics

1992 ◽  
Vol 7 (9) ◽  
pp. 2599-2611 ◽  
Author(s):  
Phillip B. Messersmith ◽  
Samuel I. Stupp
Keyword(s):  
Vinyl Alcohol ◽  
Water Soluble ◽  
Polymer Chains ◽  
Poly Vinyl Alcohol ◽  
Synthetic Approach ◽  
New Materials ◽  
Water Soluble Polymers ◽  
Homogeneous Solutions ◽  
New Processing ◽  
Diffuse Reflectance Infrared

We report here on the synthesis of new materials termed organoceramics in which polymers are molecularly dispersed within inorganic crystalline phases. These nanocomposite materials may not only have unique morphologies and physical properties but may also lead to new processing methods for ceramic-based materials. In organoceramics polymer molecules could opportunistically occupy sites such as grain boundaries or other two-dimensional defects, nanopores, lattice channels, or interlamellar spaces. Our synthetic approach to get macromolecules to those sites is to nucleate and grow inorganic crystals from homogeneous solutions containing the polymer chains as co-solutes. The new materials discussed in this manuscript were synthesized by growing calcium aluminate crystals in the presence of water soluble polymers and were characterized by x-ray diffraction, scanning electron microscopy, elemental analysis, and diffuse reflectance infrared spectroscopy. The macromolecules used in organoceramic synthesis included poly(vinyl alcohol), poly(dimethyldiallyl ammonium chloride), and poly(dibutyl ammonium iodide). We found that the chemistry of polymer repeats can impact on the spatial distribution of the dispersed organic chains and also on the morphology of organoceramic powders. In the case of the poly(vinyl alcohol) organoceramic the polymer is intercalated in “flattened” conformations in Ca2Al(OH)6[X] ·nH2O, thus increasing the distance between ionic layers from 7.9 Å to ∊ 18 Å (X is a monovalent or divalent anion). Such a layered nanocomposite can be formed only by intercalating the poly(vinyl alcohol) during growth of the Ca2Al(OH)6[X] · nH2O crystal. The synthetic pathway is therefore able to overcome large entropic barriers and incorporate significant amounts of polymer in the organoceramic product, in some cases up to 38% by weight. The particles of this nanocomposite are spheroidal aggregates of thin plate crystals whereas the use of a polycationic polymer in the synthesis leads to rod-like particles in which organic chains may reside in channels of the inorganic crystal.

Radiation processing and characterization of poly(vinyl alcohol) nano-composites, Part 1: Nano-particulate filler tuned crosslinking behavior

2010 ◽  
Vol 118 (6) ◽  
pp. 3490-3498 ◽  
Author(s):  
Kumar A. Dubey ◽  
Chandrasekhar V. Chaudhari ◽  
Rekha Rao ◽  
Yatender K. Bhardwaj ◽  
Narender K. Goel ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Nano Composites ◽  
Radiation Processing ◽  
Particulate Filler

Structure of junction zones in poly (vinyl alcohol) gels by rheological and thermal studies

1996 ◽  
Vol 93 ◽  
pp. 880-886 ◽  
Author(s):  
K Nishinari ◽  
M Watase ◽  
F Tanaka
Keyword(s):  
Vinyl Alcohol ◽  
Thermal Studies ◽  
Poly Vinyl Alcohol

High modulus poly (vinyl alcohol) fibers by zone drawing

1986 ◽  
Vol 1 (6) ◽  
pp. 861-869 ◽  
Author(s):  
Paul D. Garrett ◽  
David T. Grubb
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
High Modulus

BIODEGRADATION BEHAVIOR OF POLY(VINYL ALCOHOL) - WOOD COMPOSITES

2019 ◽  
Vol 18 (1) ◽  
pp. 125-136 ◽  
Author(s):  
Luiza Jecu ◽  
Iuliana Raut ◽  
Elena Grosu ◽  
Mariana Calin ◽  
Violeta Purcar ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Wood Composites

EFFICIENCY OF THE POLY (VINYL ALCOHOL) (PVA) HYDROGELS AS SOIL CONDITIONER, DETERMINED BY MONITORING THE CAPSICUM SP. L. GROWTH

2011 ◽  
Vol 10 (2) ◽  
pp. 225-230
Author(s):  
Silvia Patachia ◽  
Delia Mincea ◽  
Camelia Scarneciu
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Soil Conditioner
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