دراسة تاثير الحرارة على قيم معامل انتشار المحاليل لمادة اساس و اخرى متراكبة

Fibers reinforced unsaturated polyester composites were prepared and studied their changes in the weight of the samples before and after immersed in some solutions. Composites were papered by hand layup method using woven roving ( E – glass fiber + Kevlar fiber ) as reinforcement with a volume fraction 30% The diffusion coefficient (D) was calculated for each liquid and also the weight loss for intervals which extend to 3 month, the results were discussed.