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Synthesis of epoxy-clay nanocomposites. Influence of the nature of the curing agent on structure
2001 (English)In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 42, no 10, 4493-4499 p.Article in journal (Refereed) Published
Abstract [en]

Epoxy-clay nanocomposites were synthesised by swelling an organophilic montmorillonite in a diglycidyl ether of bisphenol A resin with subsequent polymerisation. Three different curing agents were used: an aliphatic diamine and two cycloaliphatic diamines. The cure kinetics of these systems was evaluated by differential scanning calorimetry and the structure of the nanocomposites was characterised by X-ray diffraction and transmission electron microscopy. Successful nanocomposite synthesis was dependent not only on the cure kinetics of the epoxy system but also on the rate of diffusion of the curing agent into the galleries because it affects the intragallery cure kinetics. The nature of the curing agent influences these two phenomena substantially and therefore the resulting structure of the nanocomposite. The curing temperature controls the balance between the extragallery reaction rate of the epoxy system and the diffusion rate of the curing agent into the galleries. Thus, the choice of curing agent and curing conditions controls the extent of exfoliation of the clay in the material.

Place, publisher, year, edition, pages
2001. Vol. 42, no 10, 4493-4499 p.
Keyword [en]
nanocomposites, cure kinetics, epoxy-clay, composites
Identifiers
URN: urn:nbn:se:kth:diva-20378ISI: 000167050500003OAI: oai:DiVA.org:kth-20378DiVA: diva2:339073
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Berglund, Lars A.

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