Material Analysis
15 visualizaciones
Fast UV aging of EAA
Fenómeno del problema
After 48h of UV irradiation, the mechanical properties of EAA decrease by >20% and it yellows
Análisis de la causa
EAA molecular chains rapidly degrade by photo-oxidation under UV; surface molecular chains break to form microcracks
Solución
1) Add 0.3-0.5wt% UV absorber to block UV; 2) Add 0.2wt% HALS for radical scavenging; 3) 2wt% carbon black to physically shield UV
Conclusión clave
Fast UV aging is caused by photo-oxidation; UV absorber and HALS are the key
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!