Journal ArticleDOI
Thermal and anticorrosive properties of polyurethane/clay nanocomposites
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TLDR
In this paper, a montmorillonite clay has been modified with two quaternary ammonium salts, dilauryldimethylammonium bromide (LD) and 4,4′-diaminodiphenylmethane (AP), to form the corresponding organophilic clays, LDM and APM.Abstract:
A montmorillonite clay has been modified with two different quaternary ammonium salts, dilauryldimethylammonium bromide (LD) and 4,4′-diaminodiphenylmethane (AP), to form the corresponding organophilic clays, LDM and APM. Two series of PU/clay nanocomposite materials, PU/LDM and PU/APM, were then prepared by the reaction of appropriate amounts of PPG, TDI and 1,4 butandiol, followed by addition of the various amounts of LDM or APM. The X-ray diffraction patterns and transmission electron micrographs of the nanocomposites revealed that the modified clay galleries were exfoliated or intercalated in the polyurethane matrix. In comparison with the corresponding pure PU, the results of the TGA and LOI measurements showed that the thermal stability and the flame retardancy of the PU/clay nanocomposites were significantly enhanced due to the presence of the dispersed nanolayers of the organophilic clay in the PU matrix. Using the Tafel method, the results of the electrochemical measurements, which included the corrosion potential, polarization resistance and corrosion current, showed that all the PU/clay nanocomposites, even with low clay loading, in the form of coating on stainless steel disk (SSD) exhibited better corrosion protection over the pure PU. The SSD coated with the composite containing 2 wt% of APM showed the lowest corrosion rate, which was one order lower than that of the SSD coated with the pure PU.read more
Citations
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Journal ArticleDOI
Effect of nanoparticles on the anticorrosion and mechanical properties of epoxy coating
TL;DR: In this article, homogeneous epoxy coatings containing nanoparticles of SiO 2, Zn, Fe 2 O 3 and halloysite clay were successfully synthesized on steel substrates by room-temperature curing of a fully mixed epoxy slurry diluted by acetone.
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The effect of organic modifier of the clay on morphology and crystallization properties of PET nanocomposites
Carmen Iara Walter Calcagno,Carmen Iara Walter Calcagno,C.M. Mariani,Sérgio R. Teixeira,Raquel S. Mauler +4 more
TL;DR: In this paper, PET nanocomposites of intercalated and exfoliated morphologies were obtained, and an average maximum distance between the platelets was observed in the inter-calated morphology.
Journal ArticleDOI
Polyurethane nanocomposite based gas barrier films, membranes and coatings: A review on synthesis, characterization and potential applications
TL;DR: In this article, a review aimed at highlighting the gas barrier property of polyurethane nanocomposite (PUNC) based films, membranes and coatings containing platelet-shaped fillers such as clays and graphene in PU matrix.
Journal ArticleDOI
The role of the MMT on the morphology and mechanical properties of the PP/PET blends
Carmen Iara Walter Calcagno,Carmen Iara Walter Calcagno,C.M. Mariani,Sérgio R. Teixeira,Raquel S. Mauler +4 more
TL;DR: In this paper, the effect of the addition of the maleic anhydride grafted polypropylene (PP-MA) and montmorillonite (MMT) on the morphology and mechanical properties was evaluated.
Journal ArticleDOI
Thermal and viscoelastic properties of polyurethane-imide/clay hybrid coatings
TL;DR: In this article, the synthesis and characterization of polyurethane (PU)-imide/clay hybrid coatings based on two types of polyester (PE) polyols (PE-1 and PE-2) was reported.
References
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Journal ArticleDOI
Polymer Layered Silicate Nanocomposites
TL;DR: In this paper, a new, versatile and environmentally benign synthesis approach by polymer melt intercalation is discussed. But, unlike in-situ polymerization and solution inter-calation, melt interalation involves mixing the layered silicates with the polymer and heating the mixture above the softening point of the polymer.
Journal ArticleDOI
Flammability Properties of Polymer - Layered-Silicate Nanocomposites. Polypropylene and Polystyrene Nanocomposites
Jeffrey W. Gilman,Catheryn L. Jackson,Alexander B. Morgan,Richard H. Harris,Evangelos Manias,Emmanuel P. Giannelis,Melanie Wuthenow,Dawn Hilton,Shawn H. Phillips +8 more
TL;DR: In this paper, the mechanism of flammability reduction of polypropylene-graft-maleic anhydride and polystyrene−layered-silicate nanocomposites using montmorillonite and fluorohectorite was investigated.
Journal ArticleDOI
Synthesis and properties of polyimide–clay hybrid
TL;DR: A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmoroniite intercalated with an ammonium salt of dodecylamine as mentioned in this paper.
Journal ArticleDOI
Synthesis and barrier properties of poly(ε‐caprolactone)‐layered silicate nanocomposites
TL;DR: In this article, a polymer-ceramic nanocomposite was synthesized consisting of well-dispersed, two-dimensional layers of an organically modified mica-type silicate (MTS) within a degradable poly(e-caprolactone) matrix.
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