Development of high-performance epoxy/clay nanocomposites by incorporating novel phosphonium modified montmorillonite

Novel organoclays were synthesized by several kinds of phosphonium cations to improve the dispersibility in matrix resin of composites and accelerate the curing of matrix resin. The possibility of the application for epoxy/clay nanocomposites and the thermal, mechanical, and adhesive properties were...

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Bibliographic Details
Published in:Journal of applied polymer science 2011-10, Vol.122 (1), p.666-675
Main Authors: Saitoh, Keiji, Ohashi, Kenji, Oyama, Toshiyuki, Takahashi, Akio, Kadota, Joji, Hirano, Hiroshi, Hasegawa, Kiichi
Format: Article
Language:English
Subjects:
adhesive properties
Applied sciences
Cations
Clay (material)
Composites
curing behavior
epoxy
Exact sciences and technology
Exfoliation
Forms of application and semi-finished materials
Materials science
Morphology
Nanocomposites
organoclay
Particulate composites
Polymer industry, paints, wood
Polymers
Resins
Technology of polymers
thermal properties
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Summary:Novel organoclays were synthesized by several kinds of phosphonium cations to improve the dispersibility in matrix resin of composites and accelerate the curing of matrix resin. The possibility of the application for epoxy/clay nanocomposites and the thermal, mechanical, and adhesive properties were investigated. Furthermore, the structures and morphologies of the epoxy/clay nanocomposites were evaluated by transmission electron microscopy. Consequently, the corporation of organoclays with different types of phosphonium cations into the epoxy matrix led to different morphologies of the organoclay particles, and then the distribution changes of silicate layers in the epoxy resin influenced the physical properties of the nanocomposites. When high‐reactive phosphonium cations with epoxy groups were adopted, the clay particles were well exfoliated and dispersed. The epoxy/clay nanocomposite realized the high glass‐transition temperature (Tg) and low coefficient of thermal expansion (CTE) in comparison with those of neat epoxy resin. On the other hand, in the case of low‐reactive phoshonium cations, the dispersion states of clay particles were intercalated but not exfoliated. The intercalated clay did not influence the Tg and CTE of the nanocomposite. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.33432