Interactions of Kevlar® fibers with selected model compounds: water sorption and dynamic mechanical properties of fiber/matrix samples

Autor:	Serge Rebouillat, M. Escoubes, R. Gauthier
Rok vydání:	1996
Předmět:	Materials science Diffusion Sorption Surfaces and Interfaces General Chemistry Kevlar Dynamic mechanical analysis Epoxy Surfaces Coatings and Films Aramid Rheology Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Composite material Water content
Zdroj:	Journal of Adhesion Science and Technology. 10:635-650
ISSN:	1568-5616 0169-4243
DOI:	10.1163/156856196x00689
Popis:	The present study deals with the sorption of water on Kevlar®‡ fibers and on a selected range of fiber-reinforced samples, in order to characterize the related interactions and to determine their influence on the dynamic properties (tan δ) of the specimens tested. The diffusion coefficients and the water content values at equilibrium show that the fibers significantly 'slow down' the diffusion with respect to the matrix. Water regain is proportional to the capacity of each component to sorb water. The rheological behavior of the composites reveals a plasticization effect associated with the water sorption. This phenomenon can be masked under certain experimental conditions. Among the treatments performed on the Kevlar® fibers to enhance the adhesion to the matrix, an epoxy coating tends to reduce the water regain, the rate of sorption, and the plasticization effects, while the plasma treatment did not reveal a significant effect in this study.
Databáze:	OpenAIRE
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