Description

This paper summarizes the results of the researchperformed to evaluate the UVC photodegradation of differentpolymers used in HVAC systems. The photodegradation of thepolymers was monitored using mass loss as discussed in PartI of the project (Kauffman 2012). The polymers evaluated inthis project did not contain fillers so that the long-term relationshipbetween rate of mass loss (rate of photodegradation)and UVC irradiance could be studied in the range of 1000 to11,000 microwatts per square centimeter without the influenceof inorganic particle accumulation. The UVC rates ofmass loss for each studied polymer were determined and thenplotted versus their respective irradiances. For the majority ofthe studied polymers, linear plots were produced demonstratingthat the law of reciprocity was obeyed by UVC photodegradation,i.e., the photodegradation mechanism was independent of irradiance or exposure time and the polymermass loss caused by UVC could be predicted based solely ondosage.

Citation: ASHRAE Trans., vol. 118, pt. 2, San Antonio, TX

Product Details

Published:

2012

Number of Pages:

12

File Size:

1 file , 6.3 MB

Product Code(s):

D-SA-12-027