Standard Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications

Importancia y uso:

4.1 The ability of a plastic material to resist deterioration of its electrical, mechanical, and optical properties caused by exposure to light, heat, and water can be very significant for many applications. This practice is intended to induce property changes associated with end-use conditions, including the effects of daylight, moisture, and heat. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater exposure.

4.2 Caution—Variations in results are possible when operating conditions are varied within the accepted limits of this practice. Therefore, all references to the use of this practice must be accompanied by a report prepared in accordance with Section 9 that describes the specific operating conditions used. Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained in accordance with this practice.

Note 2: Additional information on sources of variability and on strategies for addressing variability in the design, execution, and data analysis of laboratory-accelerated exposure tests is found in Guide G141.

4.3 Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control.6^,7 Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. It is preferable that the number of specimens of the control material be the same as that used for test materials. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.

4.4 Test results will depend upon the care that is taken to operate the equipment in accordance with Practice G155. Significant factors include regulation of line voltage, freedom from salts or other deposits from water, temperature and humidity control, and condition and age of the lamp and filters.

Subcomité:

D20.50

Referida por:

D1047-21, F2905_F2905M-24A, D3105-17R24, F2968_F2968M-24, E0154_E0154M-08AR19, D7031-11R19, D2513-24, D2239-22, F0964-13R24, D3218-07R18, D5592-94R18, F1858-98R20, C1900-24, F2623-24E01, F3123-22, D5071-06R21, F3534_F3534M-22, F3597-23, D7436-17R24, D1248-16, D6662-22, D2737-22, F1838-19, D4000-23, F2947_F2947M-21A, F3390-20R24, D4101-24, F1988-99R20, F2788_F2788M-24, F1988-99R20, F0790-23, F3378_F3378M-22, F3288_F3288M-20R24, F3459-21, G0155-21, D4976-12AR20, G0178-16R23, D5870-22, D7032-21

Volúmen:

08.01

Número ICS:

83.140.01 (Rubber and plastic products in general)

Palabras clave:

degradation; exposure; light exposure; ultraviolet; xenon-arc;