A novel strategy for nanoclay exfoliation in thermoset polyimide nanocomposite systems

Gintert, Michael J.; Jana, Sadhan C.; Miller, Sandi G.

doi:10.1016/j.polymer.2007.05.053

Cited by 46 publications

(24 citation statements)

References 31 publications

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“…Several techniques have been applied to prepare polymer/layered silicate nanocomposites, such as solution intercalation, in situ intercalative polymerization, melt intercalation, and in situ direct synthesis . Among them the most common and important approach is melt processing technique, also called melt intercalation, since it is highly relevant for industrial applications and the elimination of possible host‐solvent and polymer‐solvent interactions in addition to cost reduction.…”

Section: Introductionmentioning

confidence: 99%

The addition effect of hollow glass microsphere on the dispersion behavior and physical properties of polypropylene/clay nanocomposites

Jung

Kang

Cheon

et al. 2018

J of Applied Polymer Sci

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Polypropylene (PP) nanocomposites have been widely researched for last decade due to its high mechanical property and multiple usages in various industrial fields from automobile to consumer packaging. Dispersion of nanoclay in polyethylene and PP is the key factor due to their hydrophobic property. Adding surfactant or introducing a polymer with a functional group, and modifying a natural clay with organic ions have been tried to achieve the better dispersion of clay in polymer matrix. In this study, the PP/clay nanocomposite with maleic anhydride grafted PP and hollow glass microspheres (HGMs) at various compositions were prepared and characterized. The addition of HGMs to PP/clay nanocomposites significantly improved the tensile stress at yield point except 7 wt % of HGMs. It is assumed that this could be due to not only the reinforcing effect of HGMs in PP, but the crushing effect of HGMs on the clay resulting in interlayer increase of clay as well. The barrier properties was also found to be improved about 32% max resulting from the better dispersion and presence of HGMs. It could be assumed that the HGMs could act as a ball creating a ball milling crush force to achieve the better dispersion of clay in the polymer and improve nanocomposite performance. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47476.

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Section: Introductionmentioning

confidence: 99%

The addition effect of hollow glass microsphere on the dispersion behavior and physical properties of polypropylene/clay nanocomposites

Jung

Kang

Cheon

et al. 2018

J of Applied Polymer Sci

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“…Polymer–clay nanocomposites often exhibit remarkable improvement properties when compared with virgin polymer or conventional composites. These improvements can include high moduli , increased strength and heat resistance , decreased gas permeability , enhanced fire retardance , and increased corrosion protection .…”

Section: Introductionmentioning

confidence: 99%

Polyimide/organo-montmorillonite nanocomposites: A comparative study of the organoclays modified with aromatic diamines

Mansoori

Masooleh

2014

Polym. Compos.

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Six organophilic clays have been obtained through cation‐exchange between sodium montmorillonite (Na+‐Mt) and the hydrochloride salts of aromatic diamines (DA1–6). The results obtained by thermogravimetric analysis (TGA) showed that the organophilic clays start to decomposition within 150–340°C, which shows that they are thermally stable compared with conventional montmorillonite modified with aliphatic long‐chain quaternary alkyl ammonium salts. The highest thermal stability and interlayer basal spacing were observed for the organoclay obtained from 3,3′‐sulfonyl dianiline (DA2), and therefore it was chosen for preparing clay/polymer nanocomposite materials (CPN). Polyimide/clay nanocomposite materials consisting of benzophenone‐3,3′,4,4′‐tetracarboxylic dianhydride (BTDA) and 2‐(5‐(3,5‐diaminophenyl)‐1,3,4‐oxadiazole‐2‐yl)pyridine (POBD) were also obtained by an in situ polymerization reaction through a thermal imidization. DA2‐Mt was used as filler at different concentrations. Both the thermal stability and the glass transition temperature (Tg) are increased with respect to pure polyimide (PI) at low clay loadings. At high clay concentrations, the organoclay particles make aggregate and as results of this phenomena Tg and thermal stability are decreased. POLYM. COMPOS., 36:613–622, 2015. © 2014 Society of Plastics Engineers

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“…They often exhibit remarkably improved properties compared to virgin polymer or conventional composites. These improvements can include high moduli [5, 6], increased strength and heat resistance [7–10], decreased gas permeability [11, 12], enhanced fire retardance [13], increased corrosion protection [14], and as adsorbent [15]. Very recently, Baybaş and Ulusoy reported the adsorption of Th 4+ ions on composites of polyacrylamide with montmorillonite, clinoptilolite, and zeolite Y.…”

Section: Introductionmentioning

confidence: 99%

Polymer–montmorillonite nanocomposites: Chemical grafting of polyvinyl acetate onto Cloisite 20A

Mansoori¹,

Akhtarparast²,

Zamanloo³

et al. 2011

Polymer Composites

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This paper is an account of the experiments on grafting polyvinyl acetate onto organophilic montmorillonite. Cloisite 20A was reacted with vinyltrichlorosilane to replace the edge hydroxyl groups of the clay with a vinyl moiety. Because the reaction liberates HCl, it was performed in the presence of sodium hydrogencarbonate to prevent the exchange of quaternary alkylammonium cations with H+ ions. Only the silanol groups on the edge of the clay react with vinyltrichlorosilane. After the reaction, the product maintained the same basal spacing as the precursor. The radical polymerization of the product with vinyl acetate as a vinyl monomer leads to chemical grafting of polyvinyl acetate onto montmorillonite surface. The homopolymer formed during polymerization was separated from the grafted organoclay by Soxhelt extraction. Chemical grafting of the polymer onto Cloisite 20A was confirmed by infrared spectroscopy. The prepared nanocomposite materials and the grafted nano‐particles were studied by XRD, SEM, and TEM. Exfoliated nanocomposite was obtained for 0.5% clay content. Nanocomposites with 1% and 3% clay contents showed significant intercalation and agglomeration occurred at higher clay loadings. The nanocomposites were studied by thermogravimertic analysis (TGA) and dynamic mechanical analysis (DMTA). Improved thermo‐mechanical properties were observed for nanocomposite with 0.5% clay content. POLYM. COMPOS., © 2011 Society of Plastics Engineers.

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A novel strategy for nanoclay exfoliation in thermoset polyimide nanocomposite systems

Cited by 46 publications

References 31 publications

The addition effect of hollow glass microsphere on the dispersion behavior and physical properties of polypropylene/clay nanocomposites

The addition effect of hollow glass microsphere on the dispersion behavior and physical properties of polypropylene/clay nanocomposites

Polyimide/organo-montmorillonite nanocomposites: A comparative study of the organoclays modified with aromatic diamines

Polymer–montmorillonite nanocomposites: Chemical grafting of polyvinyl acetate onto Cloisite 20A

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