Studies on Production of Nanocomposites of Polyamide 6 with Expandable Synthetic Mica(NaMg2.5Si4O10F2). I. High Dispersion of Synthetic Mica in Polyamide 6 Matrix through Hydrolysis of .EPSILON.-Caprolactam under High Pressure.

More than twenty years have passed since we invented PCN, in which only a few wt.-% of silicate is randomly and homogeneously dispersed in the polymer matrix. When molded, these nanocomposites show superior properties compared to those of pristine polymers. The number of papers on PCN has increased rapidly in recent years, reaching over 500 in 2005 alone. Being pioneers of this new technology, we review its history relative to the following epochal events: In 1985 we invented nylon 6-clay hybrid (NCH), the first PCN. In 1989, cars equipped with a NCH part were launched.In 1997, Gilman found revolutionary fire retardancy in NCH. In 1997, a PP-clay nanocomposite was prepared using a compatibilizer. In 1998, a compounding method for producing PCN was completed. In 2002, Haraguchi invented a revolutionary nanocomposite hydrogel. So far, only nylon-clay nanocomposites have been used in practice, but other PCN will become increasingly useful in the future.SEM of etched NCH film.

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Twenty Years of Polymer‐Clay Nanocomposites

Okada

Usuki

2006

Macro Materials & Eng

724

329

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Structural characteristics and moisture sorption behavior of nylon‐6/clay hybrid films

Murase

Inoue

Miyashita

et al. 2002

J Polym Sci B Polym Phys

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The structure of nylon‐6 hybrids with synthetic or natural clays was investigated for melt‐pressed films with Fourier transform infrared spectroscopy, wide‐angle X‐ray diffraction, and differential scanning calorimetry in comparison with the nylon‐6 homopolymer. In contrast to the development of familiar α‐form crystals in plain nylon‐6 film, the hybrid films produced γ‐form crystals when nylon‐6 was conjugated with synthetic mica, whereas the hybridization with natural montmorillonite gave rise to both α‐ and γ‐crystalline modifications. The degree of crystallinity of the nylon‐6 hybrid with synthetic mica was the highest of the three series. Moisture sorption isotherms obtained for these nylon‐6‐based films were all typically sigmoid‐shaped, although the prevalence of a higher crystallinity in the hybrid samples lowered the degree of moisture regain. The sorption behavior was analyzed well in terms of the parameters of a Brunauer–Emmett–Teller multiplayer adsorption model and a Flory–Huggins treatment. It was also observed that the cluster formation of the water adsorbed into the nylon‐6 matrix tended to be restricted by the hybridization with clay. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 479–487, 2002; DOI 10.1002/polb.10106

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Effects of nanofiller loading on the molecular motion and carrier transport in polyamide

Fuse

Sato

Ohki

et al. 2009

IEEE Trans. Dielect. Electr. Insul.

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Studies on Production of Nanocomposites of Polyamide 6 with Expandable Synthetic Mica(NaMg2.5Si4O10F2). I. High Dispersion of Synthetic Mica in Polyamide 6 Matrix through Hydrolysis of .EPSILON.-Caprolactam under High Pressure.

Cited by 4 publications

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Twenty Years of Polymer‐Clay Nanocomposites

Twenty Years of Polymer‐Clay Nanocomposites

Structural characteristics and moisture sorption behavior of nylon‐6/clay hybrid films

Effects of nanofiller loading on the molecular motion and carrier transport in polyamide

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