Determine the Response of Structural and Mechanical Properties to Heat Treatment For (PMMA) Matrix Reinforcement By (Al2o3) Powder

Poly (methyl methacrylate) (PMMA) was used as a matrix for fabrication samples of polymer composites (PMCs). The reinforcement by (Al2O3) powder with volumetric ratio (20%) and an average grain size (40 ±5) μm. manufactured were treated after conducting the surface treatment operations thermally different temperatures (50,70 90 ⁰C) times (2,4,6,8, 10 hours). subjected to set mechanical microscopic tests, whereby effect thermal on bending fatigue life samples, ability material resist shear stress, flexural strength, wear, compressive resistance impact resistance. results showed that there improvement in life, wear resist, heat samples. best resistance, strength occurred 6 hours post cure time, while it observed passage (4hours) time. also temperature is (T=70⁰C).