Highly Predictive Accelerated Weathering of Engineering Thermoplastics
2003-01-1192
03/03/2003
- Event
- Content
- Current accelerated weathering protocols such as SAE J1960 or ASTM G26 do not provide reliable, predictive results for engineering thermoplastics. Correlation factors among resin types and even different colors of a single resin have variations that are 60-100% of the mean at the 95% confidence level, making these tests useless for lifetime prediction or even reliable ranking of materials. We have developed improved conditions using CIRA/sodalime-filtered xenon arc, a more rain-like water spray, and occasional sponge-wiping of the samples. The data for gloss loss and color shift agree very well with Florida data giving a correlation factor of 3100±680 kJ/m2 (at 340 nm) per Florida year at the 95% confidence level. The acceleration factor is 7.6x.
- Pages
- 7
- Citation
- Pickett, J., and Umamaheswaran, V., "Highly Predictive Accelerated Weathering of Engineering Thermoplastics," SAE Technical Paper 2003-01-1192, 2003, https://doi.org/10.4271/2003-01-1192.