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Chemical interactions between the carbon fibre surface and epoxy resins

✍ Scribed by E. Fitzer; K.-H. Geigl; W. Hüttner; R. Weiss

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
569 KB
Volume
18
Category
Article
ISSN
0008-6223

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✦ Synopsis

Surface oxides on various carbon fibres were determined after modified oxidation treatment with nitric acid. Improved wetting was investigated by contact angle measurements.

The results of these systematic studies are correlated with the mechanical properties of UDcomposites, prepared from the matrix precursors with which the wetting experiments have been performed.

A possible mechanism of the bonding between epoxy matrix precursors and reinforcing fibres was determined by contact angle measurements, by surface tension measurements and by chemical analysis of the chemisorpted diamine hardener.

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The cure of a tetrafunctional epoxy resin ( largely tetraglycidyldiaminodiphenylmethane, TGDDM ) , cross-linked with diaminodiphenylsulphone ( DDS ) and boron trifluoride/ethylamine (BF,EA) catalyst, is affected in a complex fashion by the presence of an oxidized carbon fiber surface. If the fiber i