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AuthorValiya Parambath, Swapna
AuthorPonnamma, Deepalekshmi
AuthorSadasivuni, Kishor Kumar
AuthorThomas, Sabu
AuthorStephen, Ranimol
Available date2020-09-10T10:45:18Z
Publication Date2017
Publication NameJournal of Applied Polymer Science
AbstractAn effective amphiphilic polyhedral oligomeric silsesquioxane (POSS) encapsulated poly(vinyl alcohol) (PVA) nanocomposite was successfully fabricated by solution blending method. Anionic octa(tetramethylammonium) (Octa-TMA) and poly(ethylene glycol) (PEG) were used as cage side groups in POSS (Octa-TMA-POSS and PEG-POSS) for the present study. Transmission electron microscopic analysis revealed the uniform dispersion of POSS in the PVA matrix. Crystallinity of PVA/POSS system was computed from differential scanning calorimetric studies. The effect of POSS on the mechanical, dynamic mechanical, and dielectric properties of PVA has been analyzed and discussed in detail with respect to the weight percentage of POSS. The incorporation of POSS in PVA matrix remarkably enhances the Young's modulus of the matrix. The viscoelastic properties such as storage modulus, loss modulus, damping behavior, and glass transition temperature of the membranes were evaluated. The relaxation corresponding to the crystal-crystal slippage characteristic of semicrystalline polymers were observed in storage modulus curves of PVA/POSS system, suggesting the crystalline nature of matrix even in the presence of POSS. Less polar, inert, and stiff inorganic center core of POSS contributes to the reduced energy dissipation and dielectric constant of PVA/POSS system. 1 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45447. 1 2017 Wiley Periodicals, Inc.
PublisherJohn Wiley and Sons Inc.
Subjectdielectric properties
Subjectdifferential scanning calorimetry
Subjectglass transition
Subjectmechanical properties
TitleEffect of nanostructured polyhedral oligomeric silsesquioxane on the physical properties of poly(vinyl alcohol)
Issue Number43
Volume Number134

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