Montmorillonite clay/poly(methyl methacrylate) hybrid resin and its barrier property to the plasticizer within poly(vinyl chloride) composite

Abstract

ABSTRACT:A poly(methyl methacrylate) (PMMA)-clay hybrid resin was prepared via bulk polymerization methyl methacrylate monomer in the presence of montmorillonite intercalated with an ammonium salt of dctadecylamine. The products were characterized by infrared spectroscopy, X-ray diffraction, pyrolysis gas chromatography, and transmission electron microscopy. Results confirm that the resin is intercalated with PMMA molecules. The layer spacing of montmorillonite are enlarged, whereas the silicate layers are homogeneously dispersed individually. When the PMMA-clay hybrid was blended with plasticized poly(vinyl chloride), the resulting composite exhibited excellent barrier property in preventing the plastizer's migration from the inner matrix to the surface of the product. This is presumably caused by barrier property of the silicate layers dispersed in the composite.

Pervaporation of Toluene—n-Heptane Mixtures with Hybrid PVC Membranes Containing Inorganic Particles

“…On the one hand, considering the lower flux obtained with the Wyoming and Kaolin fillers with respect to the flux of the pure PVC film, one can deduce that these two fillers clearly act as impermeable particles, increasing the tortuosity relative to their smaller average diameters, thus limiting the mass transfer of permeants [23]. Thus, the phenomenon is explained by the barrier effect of the Kaolin and Wyoming particles in which the high shape factor of montmorillonite clay can lead to a large decrease in polymer permeability [24]. The lower permeate enrichment simultaneously registered (Cp: 84% at 50 °C) is less logically explained; it must be the result of very tiny defects induced by the fillers in the composite films.…”

Fire Properties of Pinus densiflora Utilizing Fire-retardant Chemicals based on Borated and Phosphorus (I) – Combustion Characteristics

“…Various types of fireretardant treatments are used for wood. According to previous research, several methods have been used to reduce the flammability of wood and wood-based materials through chemical treatment, including impregnating a flame retardant inside the wood, applying flame retardant paints onto the surface of wood, or coating a flame-retardant film onto the surface of wooden materials (Chen et al 1999;Grexa et al 1999;Kawamoto 1999;Grexa and Lubke 2001;Seo et al 2016a). The first method involves impregnating the inside of the cell walls of wood (the pit) with flame retardants such as phosphorus, boric acid, silicabased and other inorganic chemicals, or nano-sized flame retardants.…”

“…The first method involves impregnating the inside of the cell walls of wood (the pit) with flame retardants such as phosphorus, boric acid, silicabased and other inorganic chemicals, or nano-sized flame retardants. The second method involves blocking flames by coating the surface of wooden materials with a flame-retardant coating (Chen et al 1999;Lowden and Hull 2013;Seo et al 2016a).…”

Development of Thermally Enhanced Wood-Based Materials with High VOCs Adsorption using Exfoliated Graphite Nanoplatelets for Use as Building Materials

“…Nanoscale materials have a porous nature, so it is easy to carry out a variety of impregnation methods. Researchers have impregnated nanoscale materials of various types, such as silica-based materials, zeolite, montmorillonite, and carbon materials, into coating materials (Chen et al 1999;Zhang et al 2012;Zhao et al 2013), and among these, carbon materials are also actively used in various other areas, such as the automotive industry, shipping materials industry, display materials industry, and flame retardant production (Kashiwagi et al 2004;Wen et al 2012;Dittrich et al 2013). Carbon materials are not only flame retardant, but also have a high thermal conductivity, electrical conductivity, and adsorption performance, which contributes to the reduction in the emission of indoor air pollutants (Mesarič et al 2013).…”