UV radiation, sunlight and climatic stress: challenges for the durability of plastics
Nowadays, UV radiation and climatic stress pose a major challenge for plastics. Plastics age when exposed to direct or indirect light, which can lead to a deterioration in the quality of the material. In particular, when moisture comes into play, the aging process is accelerated and can lead to significant changes in the material properties.
One of the main consequences of these influences is the loss of mechanical properties, which can be precisely measured. The focus is on the question of how much the material properties change over a defined period of time.
A frequently used test method to evaluate resistance to UV radiation and changing climatic conditions is the accelerated outdoor test according to DIN EN ISO 4892-2This test simulates solar radiation and combines it with alternating dry and wet cycles to realistically replicate the effects of environmental conditions.
Important standards for UV and weathering testing:
- DIN EN ISO 4892-2
- DIN EN ISO 105-B04
- DIN EN ISO 105-B06
- ASTM D2565
- ASTM D7356 / D7356M – 19
These standardized tests allow reliable statements to be made about the long-term durability of plastics. The results enable a well-founded assessment and optimization of materials in order to best meet the challenges posed by UV radiation and climatic influences.
