دراسة تاثير الخواص الكيميائية على الخواص الفيزيائية لمادة متراكبة من راتنج اليوريا – فورمالدهايد

The research involves using urea – formaldehyde resin as matrix for making composite material, while wood flower used as rein forcing materials and ammonium chloride as bonding materials. The speciment of composite materials were prepared with weight fraction (ψ) of (60%) of their weight. Then. The study on some physical properties (compression, bending flexural strength, hardness, impact and thermal conductivity) before and after immersion in water and solution of (Hcl) with 0.5 normality for their (30 day). Diffusion coefficient (Dx) was calculated.