Polycarbonate Glazing: Maximum and Effective Temperatures for Outdoor Weathering Exposure in the Desert of Arizona

Event
SAE World Congress & Exhibition
Authors Abstract
Content
We define an effective temperature (Teff) as an irradiance-weighted average temperature of a material during weathering. It is the constant temperature that would give the same amount of damage as the sample sustains during natural cycling and serves as a benchmark for predicting lifetimes. It is weakly dependant on the activation energy (Ea) of the degradation process. The annual effective ambient and black panel temperatures at an Arizona test site were 30° and 42°C, respectively, for Ea = 4–7 kcal/mol. Privacy color polycarbonate minivan sunroof windows had surface Teff = 45–46°C exterior, 54–58°C interior, and 49–52°C exterior blackout surfaces. Maximum recorded temperatures were 73°C, 87°C, and 81°C, respectively.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-0573
Pages
5
Citation
Sargent, J., Shuler, S., and Pickett, J., "Polycarbonate Glazing: Maximum and Effective Temperatures for Outdoor Weathering Exposure in the Desert of Arizona," SAE Int. J. Mater. Manf. 2(1):347-351, 2009, https://doi.org/10.4271/2009-01-0573.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0573
Content Type
Journal Article
Language
English