Product lifetime depends on the actual stress factors in service use
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In the weather testing of materials and products we intentionally focus on the three main weather factors. Heat, light, and moisture and their cycles are typically the most important for polymer degradation. Additionally, we also pay attention to key secondary stress factors such as atmospheric pollutants, agricultural chemicals, cleaning agents, and biological/microbiological agents.
However, one often neglected area is service use stresses; that is, stresses, usually physical in nature, that can hasten the effects of natural weathering or act as stress concentration points for damage.
In this Technical Guide you learn about:
- Freeze/thaw, mechanical constraint and loading stress
- MIL STD 810H as guidance document
- Coupon vs. product testing
- Excursions from “normal use”
