Effect of organically modified montmorillonite clay on the properties of hydroxyl terminated polydimethyl siloxane

Alex, Ancy Smitha; Kumar, Vipin; Ramanan, Rajeev; Supriya, N.; Manu, S. K.; Gouri, C.; Bandyopadhyay, G. G.; Sekkar, V.

doi:10.1080/01694243.2016.1264658

Cited by 8 publications

(1 citation statement)

References 33 publications

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“…To achieve an optimal dispersion of silicate in polymers, it is necessary to modify montmorillonite with various cationic molecules to decrease the surface energy of the clay, which enhances the distance between the layers and improves the nanofiller dispersion in the matrix [ 28 , 30 ]. In recent years, researchers replaced intralayer cations with amino compounds, thiols, and silanes, which improved clay dispersion in polymers, maximized heavy metal cations’ adsorption capacities, increased thermal stability, and improved the tensile strength and modulus [ 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. Modification by organic ions also impacts clay hydrophobicity, where the exact influence depends on cationic characteristic [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface-Modified Montmorillonite Clays on the Properties of Elastomeric Thin Layer Nanocomposites

et al. 2023

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In recent years, polyurethane nanocomposites have attracted more attention due to the massive demand for materials with increasingly exceptional mechanical, optical, electrical, and thermal properties. As nanofillers have a high surface area, the interaction between the nanofiller and the polymer matrix is an essential issue for these materials. The main aim of this study is to validate the impact of the montmorillonite nanofiller (MMT) surface structure on the properties of polyurethane thin-film nanocomposites. Despite the interest in polyurethane–montmorillonite clay nanocomposites, only a few studies have explored the impact of montmorillonite surface modification on polyurethane’s material properties. For this reason, four types of polyurethane nanocomposites with up to 3% content of MMT were manufactured using the prepolymer method. The impact of montmorillonites on nanocomposites properties was tested by thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), contact angle measurement, X-ray diffraction (XRD), and optical coherence tomography (OCT). The results showed that chemical and physical interactions between the polymer matrix and functional groups on the montmorillonite surface have a considerable impact on the final properties of the materials. It was noticed that the addition of MMT changed the thermal decomposition process, increased T2% by at least 14 °C, changed the hydrophilicity of the materials, and increased the glass transition temperature. These findings have underlined the importance of montmorillonite surface structure and interactions between nanocomposite phases for the final properties of nanocomposites.

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