Diffusion of salt water and alkaline solutions in polyester reinforced by glass fibers

Abstract EN

The solubility and kinetics of moisture transport mechanisms in type of resin and fibers have been investigated the physical tests group comprised the determination of diffusion coefficient (D) of (0.3 salt water), (0.5 NaOH), (0.5 KOH).

The study has been oriented to investigate a theme that has a crucial interest in most industrial applications, also the effect of (Salt water, NaOH, KOH) on the composites.

The composite plate contains two type of fibers, the first type: polyester-woven fiber and the second type: polyester–(random+woven) fibers.

The result shows the solution would be absorbed in the first type more than that in second type.

Because of the fiber/matrix interface plays the role of a channel for a solution to penetrate into the composite; this penetration normally starts at cut edges.

This type of channels found in the composites, , while alkaline solutions has effect on the composites.

Salt water and NaOH, in composites are more than their identical in KOH, Since polyester has high resistance to alkine as.

The diffusivity coefficient of saltwater in UP s is larger than that of NaOHand KOH.