Standard Practice for Outdoor Weathering of Plastics

Importancia y uso:

4.1 Tests conducted in accordance with this practice are used to evaluate the stability of plastic materials when they are exposed outdoors. The relative durability of plastics in outdoor use can be very different depending on the location of the exposure because of differences in ultraviolet (UV) radiation, time of wetness, temperature, pollutants, and other factors. It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location. Exposures in several locations with different climates that represent a broad range of anticipated service conditions are recommended.

4.1.1 Because of year-to-year climatological variations, results from a single exposure test cannot be used to predict the absolute rate at which a material degrades. Several years of repeat exposures are needed to get an average test result for a given location.

4.2 The results of short-term exposure tests can provide an indication of relative outdoor performance, but it is recommended they not be used to predict the absolute long-term performance of a material. The results of tests conducted for less than twelve months will depend on the particular season of the year in which they begin.

Subcomité:

D20.50

Referida por:

D4726-24, D7793-24, D2513-24, F0964-13R24, D7254-21, D4364-13R22E01, D5592-94R18, F2657-21, D3679-24, C1900-24, D1670_D1670M-11R23, C0488-16R23, F2623-24E01, D7856-21, F3123-22, E0881-92R22, D7445-24, D4216-22, D4000-23, D4101-24, D3841-21, G0178-16R23, D5870-22, G0090-23, D5272-08R21

Volúmen:

08.01

Número ICS:

83.080.01 (Plastics in general)

Palabras clave:

exposure; natural weathering; outdoor weathering; plastics;