Journal ArticleDOI
Synthesis of nylon 6-clay hybrid
Arimitsu Usuki,Yoshitsugu Kojima,Masaya Kawasumi,Akane Okada,Yoshiaki Fukushima,Toshio Kurauchi,Osami Kamigaito +6 more
TLDR
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.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.read more
Citations
More filters
Journal ArticleDOI
Polymer/layered silicate nanocomposites: a review from preparation to processing
TL;DR: A review of the academic and industrial aspects of the preparation, characterization, materials properties, crystallization behavior, melt rheology, and processing of polymer/layered silicate nanocomposites is given in this article.
Journal ArticleDOI
Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials
TL;DR: 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.
Journal ArticleDOI
Graphene-based polymer nanocomposites
TL;DR: A survey of the literature on polymer nanocomposites with graphene-based fillers including recent work using graphite nanoplatelet fillers is presented in this article, along with methods for dispersing these materials in various polymer matrices.
Journal ArticleDOI
Effects of particle size, particle/matrix interface adhesion and particle loading on mechanical properties of particulate–polymer composites
TL;DR: In this article, the effects of particle size, particle/matrix interface adhesion and particle loading on the stiffness, strength and toughness of such particulate polymer composites are reviewed.
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.
References
More filters
Journal ArticleDOI
Swelling behavior of montmorillonite cation exchanged for ω-amino acids by ∊-caprolactam
Arimitsu Usuki,Masaya Kawasumi,Yoshitsugu Kojima,Akane Okada,Toshio Kurauchi,Osami Kamigaito +5 more
TL;DR: In this article, a model where amino acid molecules were arranged perpendicular to silicate layers and ∊-caprolactam molecules filled the space between them was proposed to obtain nylon 6-clay hybrid, a molecular composite of nylon 6 and montmorillonite.
Journal ArticleDOI
Mechanism of polymerization of h-caprolactam. II. Polymerization in the presence of water
TL;DR: In this article, it was shown that the existence of polyaddition also requires transamidation reactions between linear molecules in which one chain with its endgroup reacts with an amide group of a second chain under formation of two other chains of different lengths.
Journal ArticleDOI
Reactions catalyzed by minerals. Part III. The mechanism of spontaneous interlamellar polymerizations in aluminosilicates
David H. Solomon,B. C. Loft +1 more
TL;DR: The spontaneous polymerization of hydroxymethacrylate monomers by the layer aluminosilicate montmorillonite is reported in this article, where electron-donating sites situated within the silicate lamellae initiate the spontaneous polymerisation which it is suggested proceeds by a mechanism involving radical-anions.
Journal ArticleDOI
A non‐hydrolytic polymerization of ϵ‐caprolactam. The polymerization initiated by hydrogen chloride
TL;DR: In this paper, it was shown that the polymerization of ϵ-caprolactam (CL) can be accomplished by heating the lactam under anhydrous conditions in the presence of hydrogen chloride or of salts of strong acids and ammonia or amines at temperatures of 220-260°C.