Study on the Aging Mechanism of Aerospace Plexiglass by Ultraviolet

Abstract As the main material of aircraft windshield glass, safety and reliability aviation plexiglass are very important. YB-3 Plexiglass was used as for a four-seater electric developed in China to explore mechanism ultraviolet aging. The artificially accelerated aging test carried out, mechanical thermodynamic system after studied. Through thermogravimetric dynamic analysis, it is internal PMMA photolysis materials, combined with data quantitatively qualitatively reveal law under radiation. results show that tensile ultimate stress decreases from 72.74 MPa 45.63 when time reaches 1440 h. During process, elastic modulus decreased 4.45 GPa 3.68 then increased 4.12 GPa. aero-plexiglass radiation first fracture polymer production small molecules, which leads decrease resistance improvement thermal stability material.