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Synthesis of nylon 6-clay hybrid

Published online by Cambridge University Press:  31 January 2011

Arimitsu Usuki ,
Yoshitsugu Kojima ,
Masaya Kawasumi ,
Akane Okada ,
Yoshiaki Fukushima ,
Toshio Kurauchi  and
Osami Kamigaito
Arimitsu Usuki
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
Yoshitsugu Kojima
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
Masaya Kawasumi
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
Akane Okada
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
Yoshiaki Fukushima
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
Toshio Kurauchi
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
Osami Kamigaito
Affiliation:
Toyota Central Research & Development Labs. Inc., Nagakute-cho, Aichi-gun, Aichi 480-11, Japan
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Abstract

It was found that montmorillonite cation exchanged for 12-aminolauric acid (12-montmorillonite) was swollen by ∊-caprolactam to form a new intercalated compound. Caprolactam was polymerized in the interlayer of montmorillonite, a layer silicate, yielding a nylon 6-clay hybrid (NCH). The silicate layers of montmorillonite were uniformly dispersed in nylon 6. The carboxyl end groups of 12-aminolauric acid in 12-montmorillonite initiated polymerization of ∊-caprolactam, and as 12-montmorillonite content became larger, the molecular weight of nylon was reduced. From the result of end-group analysis, carboxyl end groups were more than amino end groups. The difference between the carboxyl and the amino end groups was attributed to ammonium cations (-NH3+) of nylon molecules, because the difference agreed with the anion site concentration of the montmorillonite in NCH. It is suggested that the ammonium cations in nylon 6 interact with the anions in montmorillonite.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 5 , May 1993 , pp. 1179 - 1184
Copyright
Copyright © Materials Research Society 1993

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References

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