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Abstract

The primary objective of this study is to examine the role of reactive and nonreactive surfactants in exfoliation and dispersion of clay platelets in vinyl ester resin and evaluate the mechanical properties of final nanocomposites. The morphology of the nanocomposites was characterized using X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM) and the mechanical properties of the nanocomposite were determined by performing tensile measurements. When the clay was ion-exchanged with a combination of reactive and nonreactive surfactants and mixed with vinyl ester resin, a partially exfoliated vinyl ester nanocomposite was formulated. The degree of dispersion of the clay platelets in vinyl ester matrix was found to be sensitive to the chemistry associated with clay platelet modification, reactive comonomer, and processing conditions. At montmorillonite clay content of only 2.5 wt%, the modulus improved by 20% in partially reactive organoclay dispersed nanocomposite, while the modulus improved by 10% in nonreactive organoclay-dispersed nanocomposite compared to that of unfilled cured vinyl ester resin.

Keywords

vinyl ester nanocomposites montmorillonite clay reactive clay TEM XRD

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Chemically Functionalized Clay Vinyl Ester Nanocomposites II - Vernonia Oil-based Surfactant

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