Journal ArticleDOI
Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials
TLDR
In this article, a review of polymer-layered silicate nanocomposites is presented, where the polymer chains are sandwiched in between silicate layers and exfoliated layers are more or less uniformly dispersed in the polymer matrix.Abstract:
This review aims at reporting on very recent developments in syntheses, properties and (future) applications of polymer-layered silicate nanocomposites. This new type of materials, based on smectite clays usually rendered hydrophobic through ionic exchange of the sodium interlayer cation with an onium cation, may be prepared via various synthetic routes comprising exfoliation adsorption, in situ intercalative polymerization and melt intercalation. The whole range of polymer matrices is covered, i.e. thermoplastics, thermosets and elastomers. Two types of structure may be obtained, namely intercalated nanocomposites where the polymer chains are sandwiched in between silicate layers and exfoliated nanocomposites where the separated, individual silicate layers are more or less uniformly dispersed in the polymer matrix. This new family of materials exhibits enhanced properties at very low filler level, usually inferior to 5 wt.%, such as increased Young’s modulus and storage modulus, increase in thermal stability and gas barrier properties and good flame retardancy.read more
Citations
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Journal ArticleDOI
A brief review on fire retardants for polymeric foams
Jian Wang,Wan Ki Chow +1 more
TL;DR: In this article, the physical and chemical aspects of intumescent fire retardants are summarized with reference to commonly available polymeric foams and new products based on nanocomposites are introduced as well.
Journal ArticleDOI
Thermal stability and flammability properties of heterophasic PP–EP/EVA/organoclay nanocomposites
Mario Valera-Zaragoza,Eduardo Ramírez-Vargas,Francisco J. Medellín-Rodríguez,B. M. Huerta-Martínez +3 more
TL;DR: In this article, the thermal behavior and flammability properties of the heterophasic polypropylene-(ethylene-propylene) copolymer (PP-EP)/poly (ethylene vinyl acetate) (EVA)/montmorillonite nanocomposite were presented.
Journal ArticleDOI
Pore size determination of TEMPO-oxidized cellulose nanofibril films by positron annihilation lifetime spectroscopy.
Hayaka Fukuzumi,Tsuguyuki Saito,Shinichiro Iwamoto,Yoshiaki Kumamoto,Yoshiaki Kumamoto,Toshiyuki Ohdaira,Ryoichi Suzuki,Akira Isogai +7 more
TL;DR: The pore sizes in wood and tunicate TEMPO-oxidized cellulose nanofibril (TOCN-COONa) films in a vacuum revealed that the pore size remained nearly at 0.47 nm, which is probably the cause of this high oxygen-barrier properties at 0% RH.
Journal ArticleDOI
Preparation and thermal stability of boron-containing phenolic resin/clay nanocomposites
TL;DR: In this article, the authors combined boron and clay with phenolic resins to prepare nanocomposites (BH-B, BP-B and BE-B series).
Journal ArticleDOI
Synthesis of polylactide/clay composites using structurally different kaolinites and kaolinite nanotubes
TL;DR: In this article, the synthesis and properties of novel polymer/clay nanocomposites based on biodegradable polymer-polylactide (PLA) were investigated.
References
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Journal ArticleDOI
Mechanical properties of nylon 6-clay hybrid
Yoshitsugu Kojima,Arimitsu Usuki,Masaya Kawasumi,Akane Okada,Yoshiaki Fukushima,Toshio Kurauchi,Osami Kamigaito +6 more
TL;DR: In this paper, the properties of nylon 6-clay hybrids, such as molecular composites of nylon and silicate layers of montmorillonite and saponite, NCH's and NCHP's, respectively, have been synthesized.
Journal ArticleDOI
Synthesis of nylon 6-clay hybrid
Arimitsu Usuki,Yoshitsugu Kojima,Masaya Kawasumi,Akane Okada,Yoshiaki Fukushima,Toshio Kurauchi,Osami Kamigaito +6 more
TL;DR: In this paper, the carboxyl and amino end groups were attributed to ammonium cations (-NH3+) of nylon molecules, because the difference agreed with the anion site concentration of the montmorillonite in NCH.
Journal ArticleDOI
Flammability and thermal stability studies of polymer layered-silicate (clay) nanocomposites
TL;DR: In this article, an overview of the research to date on the use of clays, dispersed at the nanometer level, in polymers for improving thermal stability and flammability is presented.
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
Preparation and Mechanical Properties of Polypropylene−Clay Hybrids
TL;DR: In this paper, the dispersibility of 10-A-thick silicate layers of the clays in the hybrid was investigated by using a transmission electron microscope and X-ray diffractometer.
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