Diffusion of various liquids to tubular shaped fiber reinforced composites

Ali Hamid AL-Abdly, Hussein; J. Salah, Najat; A. AbdulRazak, Adnan; Sh. Majdi, Hassen

doi:10.30684/etj.26.8.3

	Diffusion of various liquids to tubular shaped fiber reinforced composites
Engineering and Technology Journal
Article 1, Volume 26, Issue 8, 2008, Pages 919-937 PDF (476.74 K)
DOI: 10.30684/etj.26.8.3
Authors
Hussein Ali Hamid AL-Abdly; Najat j. Salah; Adnan A. AbdulRazak; Hassen Sh. Majdi
Abstract
In present work tubular –shaped fiber reinforced composites were manufactured by using two types of resins ( Epoxy and unsaturated polyester) and separately reinforced with glass, carbon and kevlar-49 fibers (filament and woven roving), hybrid reinforcement composites of these fibers were also prepared. The fibers were wet wound on a mandrel using a purposely designed winding machine, developed by modifying an ordinary lathe, in winding angle of 55° for filament. Various liquids were allowed to diffuse into the composite samples, where all composite samples were immersed in water, HCl (0.5N, IN) and NaOH (0.5N, 1N). The exhibited behaviors were mainly explained in accordance to Fick’s –law. However, there were few case of anomalous behavior observed. The observed difference in diffusion rate for acidic and basic solutions may be explained in terms of different permeability of OH- and H+ ions in the composite samples. This permeability was also found to be affected by the debonding process which might be initiated by the liquid penetration. Diffusion coefficients were also deduced and their relatively higher values are indicative for some damage mechanism taking place in the composite and not the pure matrix. UP composite exhibited higher values than EP composite which suggest that higher damage has taken place in UP-composite.
Keywords
diffusion; tubular shaped; composites

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