Material Analysis
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Poor EEA weather resistance
Fenómeno del problema
EEA after 6 months outdoors shows mechanical property decline of 40-50%, surface cracking
Análisis de la causa
EEA polyolefin skeleton photo-oxidative degradation, molecular chain breakage; ultraviolet rays directly attacking C-C bonds
Solución
1) UV-327 0.5-1wt% to absorb ultraviolet rays; 2) HALS-770 0.2-0.5wt% for light stabilization; 3) 1010+168 antioxidant 0.3wt% to prevent oxidation
Conclusión clave
Poor weather resistance is caused by photo-oxidation; UV+HALS+antioxidant triple protection is key
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