تأثير التحفير الرطب لالياف الزجاج و الياف البولي اميد على خواص الأنحناء و الصدم للمواد المركبة الناتجة

الملخص EN

Improving the bonding strength can be achieved by surface treatment of fibers .

Etching is one of the methods of this treatment , in this investigation wet etching of Eglass fibers and polyamide fibers carried out by using (H2O + NaOH) solution to get pits on their surface to increase the surface roughness .

Group of tests was carried out to study the effect of this treatment on the mechanical (bending and impact) properties of a material composed of unsaturated polyester reinforced by (10 % wt) of etched glass fibers and Etched polyamide fibers .

Also Calculation of the weight loss and executing of microscopic photo .

The results show : - Increase of the bending strength of etched glass fibers reinforced composite materials with a maximum percentage of (301 %) compared with samples reinforced with untreated fibers .

This maximum percentage was found when the fibers are treated at (25 oC) for (1 % NaOH) and (3 hr) .

- Increase of the bending strength of etched polyamide fibers reinforced composite materials with a maximum percentage of (155 %) compared with samples reinforced with untreated fibers .

This maximum percentage was found when the fibers are treated at (25 oC) for (1.5 % NaOH) and (3 hr) .

- Increase of the impact strength of etched glass fibers reinforced composite materials with a maximum percentage of (270 %) compared with samples reinforced with untreated fibers .

This maximum percentage was found when the fibers are treated at (25 oC) for (1 % NaOH) and (3 hr) .

- Increase of the impact strength of etched polyamide fibers reinforced composite materials with a maximum percentage of (232 %) compared with samples reinforced with untreated fibers .

This maximum percentage was found when the fibers are treated at (25 oC) for (0.5 % NaOH) and (5 hr) .

- Increase of the weight loss of polyamide fibers than weigth loss of glass fibers .