Material Analysis
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CEF weather resistance poor
Fenómeno do problema
After CEF is outdoors for 6 months, the mechanical properties decrease by 40-50% and the surface cracks
Análise das causas
The CEF polyolefin skeleton undergoes photo-oxidative degradation and molecular chain breakage; ultraviolet rays directly attack the C-C bonds
Solução
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
Conclusão principal
Poor weather resistance is caused by photo-oxidation; UV+HALS+antioxidant triple protection is the key
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