Journal ArticleDOI
Synthesis and barrier properties of poly(ε‐caprolactone)‐layered silicate nanocomposites
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TLDR
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.Abstract:
A new polymer-ceramic nanocomposite has been synthesized consisting of well-dispersed, two-dimensional layers of an organically modified mica-type silicate (MTS) within a degradable poly(e-caprolactone) matrix. A protonated amino acid derivative of MTS was used to promote delamination/dispersion of the host layers and initiate ring-opening polymerization of e-caprolactone monomer, resulting in poly(e-caprolactone) chains that are ionically bound to the silicate layers. The polymer chains can be released from the silicate surface by a reverse ion-exchange reaction and were shown to be spectroscopically similar to pure poly(e-caprolactone). Thick films of the polymer nanocomposite exhibit a significant reduction in water vapor permeability that shows a linear dependence on silicate content. The permeability of nanocomposite containing as low as 4.8% silicate by volume was reduced by nearly an order of magnitude compared to pure poly(e-caprolactone)read more
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Polyethylene/maleic anhydride grafted polyethylene/organic‐montmorillonite nanocomposites. I. Preparation, microstructure, and mechanical properties
TL;DR: In this article, three cationic surfactants (hexadecyltrimethylammonium chloride, hexadecyldimethylbenzenema chloride, and octadecyltrimylbenzylammium chloride) were used to modify montmorillonite and polyethylene composites, prepared by two blending processes (direct-melt blending and solution blending).
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Synthetic routes, properties and future applications of polymer-layered silicate nanocomposites
TL;DR: In this paper, the authors focus on polymer nanocomposites and their syntheses, properties and future applications, several of these application will be successful in the near future, and propose a new type of materials, based on smectite clays usually rendered hydrophobic through ionic exchange of the sodium interlayer cation with an onium cation.
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Nanocomposites based on a combination of epoxy resin, hyperbranched epoxy and a layered silicate
TL;DR: In this paper, an epoxy/clay nanocomposites have been prepared using an diglycidyl ether of bisphenol A (DGEBA) epoxy and its blend with a functionalized hyperbranched polymer (HBP), which is confirmed by wide angle X-ray diffraction and transmission electron microscopy (TEM) analysis.
Journal ArticleDOI
Preparation, structure, properties and thermal behavior of rigid-rod polyimide/montmorillonite nanocomposites
TL;DR: In this article, a mixture of polyimide/montmorillonite nanocomposites were prepared from solution of poly(amic acid) precursors and the dodecyl-montmoroniite (DMONT) using N-methyl-2-pyrrolidone as a solvent.
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Morphology and properties of thermoplastic polyurethane nanocomposites: Effect of organoclay structure
F. Chavarria,Donald R Paul +1 more
TL;DR: A series of alkyl ammonium/MMT organoclays were carefully selected to explore structure-property relationships for thermoplastic polyurethane (TPU) nanocomposites prepared by melt processing as mentioned in this paper.