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
Cellulose nanocrystal/polyolefin biocomposites prepared by solid- state shear pulverization: Superior dispersion leading to synergistic property enhancements
TL;DR: In this paper, composites of polypropylene (PP) and low density polyethylene (LDPE) with 5-10% unmodified CNC are produced via a solventless process, and optical and electron microscopy reveals excellent CNC dispersion with strongly suppressed degradation relative to composites made by melt mixing.
Journal ArticleDOI
Preparation, characterization and properties of poly (vinyl chloride)/compatibilizer/organophilic-montmorillonite nanocomposites by melt intercalation
TL;DR: In this paper, polyvinyl chloride/compatibilizer/organophilic-montmorillonite (OMMT) nanocomposites have been prepared by melt intercalation by the masterbatch process.
Journal ArticleDOI
Enhancing polymer performance through graphene sheets
Jingjing Qiu,Shiren Wang +1 more
TL;DR: Graphene sheets were synthesized through intercalation and subsequent ultrasonic processing of graphite natural flakes, and the resultant graphene has been characterized by X-ray diffraction, atomic force microscope and transmission electron microscope, and it was confirmed to be exfoliated into monolayer state as discussed by the authors.
Journal ArticleDOI
Influence of nanodispersed hydrotalcite on polypropylene photooxidation
TL;DR: In this paper, the presence of hydrotalcite was shown to change the global rate of photooxidation of polypropylene by reducing the oxidation induction time and increasing the oxidation rate.
Journal ArticleDOI
Nanostructure of EVA/organoclay nanocomposites: Effects of kinds of organoclays and grafting of maleic anhydride onto EVA
Xiucuo Li,Chang-Sik Ha +1 more
TL;DR: In this article, three kinds of organoclays were used to see their influences on the nanostructure of the EVA hybrids, and the effects of the polar interactions between the polymer and the silicate layers of organocays were also investigated by grafting maleic anhydride onto EVA.
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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