Abstract
YB-2 aviation polymethyl methacrylate (PMMA) is irradiated in a xenon arc lamp weather resistance test chamber for 1620 hours. The tensile strength, light transmittance, surface morphology, relative molecular mass, infrared absorption spectrum and glass transition temperature (Tg) of PMMA exposed in xenon arc lamp for different durations are tested and characterized by universal testing machine, optical haze instrument, scanning electronic microscopy (SEM), gel permeation chromatograph (GPC), fourier transform infrared spectrometer (FT-IR) and differential scanning calorimetry (DSC), so as to comprehensively analyze the influence of xenon arc lamp irradiation on the performance of PMMA. The results reveal that under the effect of 1620 hours xenon arc lamp irradiation and periodic spraying water, the light transmittance and glass transition temperature do not change significantly, and no new chemical group is produced. After irradiated 360 hours, tiny cracks occur in the surface of PMMA, indicating that they occur at a certain degree of degradation, meanwhile, the main chain may be broken and the relative molecular mass of surface of the material decreases. After exposure of 720 hours, the tensile strength decreases about 30%.
Highlights
To guarantee the normal flight and air safety of aircrafts, aviation perspex components such as windshields or canopies must have excellent optical performance, sufficient toughness and long service life
In this research, xenon arc lamp irradiation test of aviation perspex for 1620 hours is carried out to observe, characterize and test the morphology, structure and performance of polymethyl methacrylate (PMMA), so as to discuss the behaviors of aviation perspex during exposure to xenon arc lamp irradiation
The relative molecular mass of PMMA after exposure to xenon arc lamp irradiation for different durations is characterized by Water 515 gel permeation chromatograph (GPC)
Summary
To guarantee the normal flight and air safety of aircrafts, aviation perspex components such as windshields or canopies must have excellent optical performance, sufficient toughness and long service life. Wang lymer materials such as aviation perspex, exposure to light, hot and humidity conditions is easy to result in color change, transmittance decrease and mechanical performance reduction [1] [2]. Researchers around the world have investigated the performance evolution discipline and mechanism of aviation perspex under different environments, by simulating environmental parameters such as atmosphere, thermal oxidation, humidity and ultraviolet (UV). They conclude that sunlight is the main factor which leads to the performance change of PMMA [3]-[8]. In this research, xenon arc lamp irradiation test of aviation perspex for 1620 hours is carried out to observe, characterize and test the morphology, structure and performance of PMMA, so as to discuss the behaviors of aviation perspex during exposure to xenon arc lamp irradiation
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