Hi
We are looking for polymer by UV resistant as low as possible.
I appreciate if some one can suggest us.
Sincerely yours,
Mohammad
Good question... people always look for which is best UV resistant polymer, but you are searching for the worst.. :)
polymers with high degree of unsaturation are susceptible to UV attack.. especially by UVA rays,, ex: aramids, esters
The more sensivitive polymers towards UV ageing are polymers for which the structural units absorb in the UV range (generally from 300 to 330 nm). You can find all the polymers containing aromatic rings as PS, PC and PET. If you use commercial polymers, do not forget to verify if these polymers have not previously stabilized by incorporating of stabilizing agents.
Try any polymer with a tertiary carbon atom in the backbone, such as PP or use a polymer with high levels of unsaturation or aromatic groups in the backbone, such as aramids.
You could borrow concepts from lithography and use positive photoresist resins; they decompose when exposed to different light sources.
http://www.microchem.com/Prod-LithographyOverviewPosNeg.htm
Please visit the following website for more detailed information about mechanical, chemical, and physical properties of polymers.
www.matweb.com
Regards, Emad
https://www.matweb.com
any polymer have an azobenzene as copolymer in its struture will have a very low UV-resistant , becuase the azobenzene have high UV absorbance. Under UV irradiation, its struture will change from cis to trans
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