Abstract
The paper sets out the results of studying and analysing the kinetics of change in the service characteristics of glazing models during exposure at the Gelendzhik Climatic Testing Centre (GTsKI) in comparison with results concerning artificial ageing for predicting the service life of glazing manufactured from new organic glasses of partially crosslinked structure. The main factors acting on organic glasses were found to be UV radiation and defects in the form of thermal stresses, which during ageing affect the resistance of the glasses to surface cracking (‘silver’ crack resistance) and their optical and strength properties. The correlation of change in the service characteristics of glazing models after artificial and natural atmospheric ageing was determined, making it possible to assess the design strength of models of organic glasses under artificial laboratory conditions 3–4 times more rapidly than during atmospheric ageing. On the basis of analysis of comparative data on natural atmospheric and artificial ageing of organic glasses of linear and partially crosslinked structure, the expediency of using organic glasses of partially crosslinked structure in the oriented state for aircraft glazing was shown.
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