INVESTIGATION OF THE CHANGE IN PROPERTIES OF POLYMETHYLMETHACRYLATE TRANSPARENCIES UNDER THE ACTION OF ULTRA-VIOLET IRRADIATION, VACUUM AND TEMPERATURE

INVESTIGATION OF THE CHANGE IN PROPERTIES OF POLYMETHYLMETHACRYLATE TRANSPARENCIES UNDER THE ACTION OF ULTRA-VIOLET IRRADIATION, VACUUM AND TEMPERATURE

Ultra-violet irradiation with I = 14 milliwatt/sq cm results in damage to the surface of ST1 polymethylmethacrylate transparencies (perspex), with the result that the further use of this perspex as an optical material is impossible. Ageing of the perspex in air and in a vacuum at t = 80C has practic...

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Bibliographische Detailangaben
Hauptverfasser: Sentyurin,E. G, Osikina,E. S, Perov,B. V, Gudimov,M. M
Format: Report
Sprache:eng
Schlagworte:
ACRYLIC RESINS
AGING(MATERIALS)
DEGRADATION
ELONGATION
MECHANICAL PROPERTIES
OPTICAL PROPERTIES
Plastics
SURFACE PROPERTIES
TRANSLATIONS
ULTRAVIOLET RADIATION
USSR
VACUUM
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Zusammenfassung:Ultra-violet irradiation with I = 14 milliwatt/sq cm results in damage to the surface of ST1 polymethylmethacrylate transparencies (perspex), with the result that the further use of this perspex as an optical material is impossible. Ageing of the perspex in air and in a vacuum at t = 80C has practically no effect on the ultimate strength. However, the specific elongation may be reduced under these conditions. The relationships obtained for the strength properties of the surface layers of the perspex as a function of time of UV irradiation show the advantage of oriented perspex as compared with unoriented perspex. (Author)