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FT-IR spectroscopic study of hydrogen bonding in PA6/clay nanocomposites
Luleå tekniska universitet.
Luleå tekniska universitet.
Luleå tekniska universitet.
2002 (English)In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 43, no 8, p. 2445-2449Article in journal (Refereed) Published
Abstract [en]

Fourier transform infrared spectroscopy was used to investigate PA6/clay nanocomposites (PA6CN) with various cooling histories from the melt, including rapid cooling (water-quenched), middle-rate cooling (air-cooling) and slow cooling (mold-cooling). In contrast to pure PA6 dominated by the α-phase, the addition of clay silicate layers favor the formation of the γ-crystalline phase in PA6CN. We focus on the reason why silicate layers favor the formation of γ-phase in PA6. Vaia et al. suggested that the addition of clay layers forces the amide groups of PA6 out of the plane formed by the chains. This results in conformational changes of the chains, which limits the formation of H-bonded sheets so that the γ-phase is favored. If this assumption is correct, PA6CN is expected to show some differences as compared with PA6 with respect to hydrogen bonding. The silicate layers were indeed found to weaken the hydrogen bonding both in the α- and γ-phases. This was also confirmed by X-ray diffraction studies. The γ-phase is most likely concentrated in regions close to the silicate layers, whereas the α-phase is favored in the bulk matrix

Place, publisher, year, edition, pages
2002. Vol. 43, no 8, p. 2445-2449
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-8606DOI: 10.1016/S0032-3861(01)00810-2ISI: 000174030200038Local ID: 720d9da0-bb59-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-8606DiVA, id: diva2:981544
Note
Validerad; 2002; 20070213 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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CiteExportLink to record
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  • apa
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  • de-DE
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