Study Link Acid Rain Through the Evolution of Flexural Strain Energy Accumulated in the Novolak Composites and Reflection of the Elastic Rebound

Abstract

This study tried to show the effects of display hydrolysis of rain water non-contaminated (which was collected from the area of Kadhimiya, north of Baghdad in Iraq) and polluted once (which was collected from the Dora district of the southern city of Baghdad in Iraq), the creep resilience modulus resilience Novolak and their composites that include either glass fibers one time or asbestos glass the other time and different rates of Hexamethylene- Tetraamine (HMTA)and the nature of the relationship between the hydrolysis and the accumulation of flexural strain energy. It was evident from the study that the wasteful deep in the exposure of phenolic composites for rain water, especially acid which accelerated the accession of large failure significantly occurred in the ability of these materials on the return of absorbed mechanical elastic energy after the demise of carrying bending moving them depending on the amount of the increase in the accumulated flexural strain energy in one hand and the amount of the increase of creep resilience modulus on the other hand, according to the type of reinforcement and the ratio of (HMTA) and thus get a very low rebound elastic age creep shorter than expected in the normal circumstances.