How Light Stabilizers Protect Polymers from UV Degradation
Photodegradation occurs when polymers are exposed to various environmental factors (e.g., UV light, heat, oxygen), resulting in problems such as yellowing, cracking, and loss of physical and mechanical properties. To enhance durability and prolong service life, it is necessary to add UV absorbers and hindered amine light stabilizers (HALS) to prevent degradation caused by UV rays and improve weather resistance in various applications. The light stabilizer (HALS) is to continuously remove the free radicals generated by photo-oxidation, so that the long-term use of the polymer can prolong the service life. Furthermore, the combination of HALS and UV absorbers has a synergistic effect to prevent surface and functional defects.
