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Nylon 6–Clay Hybrid

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ζ-Caprolactam was polymerized in the interlayer spacing of montmorillonite, a clay mineral, yielding a nylon 6-clay hybrid (NCH) 1).

X-ray and TEM measurements revealed that each template of the silicate, which is 10 Å thick, was dispersed in the nylon 6 matrix and that the repeat unit increased from 12 Å in unintercalated material to 21 Å in the intercalated material.

Thus NCH, is a “polymer based molecular composite” or “nanometer composite”. NCH, when injection-molded, shows excellent properties as compared to nylon 6 in terms of tensile strength, tensile modulus and heat resistance. Heat distortion temperature increased from 65 °c for nylon 6 to 152 °c for NCH, containing 4 wt% (1.6 vol%) of clay mineral.

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  1. Presented in part at the 194th National Meetings of American Chemical Society, New Orleans, La., August 1987, Polymer Preprint 28, 447 (1987).

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  2. M. I.Kohan Ed., “Nylon Plastics”, Interscience, New York 1973.

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Okada, A., Kawasumi, M., Usuki, A. et al. Nylon 6–Clay Hybrid. MRS Online Proceedings Library 171, 45–50 (1989).

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