All types of UV can cause a photochemical effect within the polymer structure, which can lead to the degradation of the material. The higher energy UVC is the type most likely to affect plastics.
Absorbed UV energy can excite the photons in a plastic. Exciting the photons can create free radicals. While many pure plastics cannot absorb UV radiation, the presence of catalyst residues and other impurities (examples: oxygen and sodium), even in trace amounts, will often act as free radical receptors. Those free radicals can cause breaks in the polymer bonds.
Title: What does UV radiation actually do to degrade plastics?
Description: Absorbed UV energy can excite the photons in a plastic.
Published: 12/11/2009
Last Edited: 1/16/2023
Information disclaimer:
The information contained in this article is for general information purposes only. The information is provided by
United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or
warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with
respect to the website or the information, products, services, or related graphics contained on the website for any purpose.
Any reliance you place on such information is therefore strictly at your own risk.
In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss
or damage, or any loss or damage whatsoever arising from loss of materials, time or profits arising out of,
or in connection with, the use of this information.