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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of nylon 6-clay hybrid by montmorillonite intercalated with ∊-caprolactam (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 983-986 
    Details
    ISSN: 0887-624X
    Keywords: nylon 6 ; clay ; hybrid ; composite ; montmorillonite ; synthesis ; mechanical property ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: It was found that montmorillonite was intercalated with ∊-caprolactam. X-ray diffraction revealed that the chain axes of the ∊-caprolactam were parallel to the montmorillonite plates. The intercalated montmorillonite was swollen by molten ∊-caprolactam at 200°C. ∊-Caprolactam and 6-aminocaproic acid (accelerator) were polymerized with the intercalated montmorillonite at 260°C for 6 h, yielding a nylon 6-clay hybrid. X-ray diffraction and transmission electron micrography revealed that the silicate layers of the hybrid were uniformly dispersed in the nylon 6 matrix. Mechanical properties of the hybrid were improved. The strength and the modulus of the hybrid increased compared with the previously reported nylon 6 clay-hybrid (NCH) synthesized by montmorillonite intercalated with 12-aminolauric acid. The heat distortion temperature (HDT) of the hybrid was 164°C, which was 12°C higher than that of NCH. © 1993 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1993.080310418
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  • 2
    Electronic Resource
    Electronic Resource
    Novel preferred orientation in injection-molded nylon 6-clay hybrid (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 33 (1995), S. 1039-1045 
    Details
    ISSN: 0887-6266
    Keywords: Nylon 6 ; clay ; hybrid ; composite ; montmorillonite ; orientation ; crystallite ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Nylon 6-clay hybrid (NCH) is a molecular composite of Nylon 6 and uniformly dispersed silicate monolayers of montmorillonite. In this study the preferred orientation of montmorillonite and Nylon-6 crystallites in a thick (3 mm) injection-molded bar of NCH has been investigated using x-ray diffraction and electron micrography (TEM). It is clear that this bar has a triple layer structure consisting of surface, intermediate, and middle layers which have different preferred orientation. In the surface layer both the silicate monolayers and the chain axes of Nylon-6 crystallites are parallel to the bar surface though the latter are randomly oriented within the plane. In the intermediate layer the silicate monolayers remain parallel to the bar surface but the Nylon-6 crystallites rotate by 90° so that the chain axes would be perpendicular to the bar surface or the silicate monolayers. In the middle layer the silicate monolayers are randomly oriented around the flow axis of the NCH bar while remaining parallel to it, and the Nylon crystallites are randomly oriented around the flow axis while keeping their chain axes perpendicular to the silicate monolayers. It may be concluded that such preferred orientation of Nylon 6 crystallites is induced by the clay because the crystallites in the pure Nylon 6 bar have no preferred orientation. ©1995 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1995.090330707
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  • 3
    Electronic Resource
    Electronic Resource
    Fine structure of nylon-6-clay hybrid (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 625-630 
    Details
    ISSN: 0887-6266
    Keywords: Nylon-6 ; clay ; hybrid ; composite ; montmorillonite ; orientation ; Crystallite ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Nylon-6-clay hybrid (NCH) is a molecular composite of Nylon-6 and uniformly dispersed silicate monolayers of montmorillonite. In this study, orientation of montmorillonite and Nylon-6 crystallites in the NCH film was measured by x-ray diffraction and transmission electron micrography (TEM), which revealed that, the silicate layers and the Nylon-6 crystallites (γ-form) have planar orientation, independent of montmorillonite content. Based on the crystal structure model proposed by Bradbury et al., it seems that hydrogen bonded sheet plane {020} or zigzag plane of molecular backbone {110} is parallel to the film surface. In contrast, crystallites in pure Nylon-6 film are randomly oriented. The degree of orientation of Nylon-6 crystallites increases with content of montmorillonite. © 1994 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320404
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