Material Analysis 14 visualizações

MP poor weather resistance

Fenómeno do problema

MP after 6 months outdoors, mechanical properties decline 40-50%, surface cracks

Análise das causas

MP polyolefin backbone photo-oxidative degradation, molecular chain breakage; UV directly attacks C-C bonds

Solução

1) UV-327 0.5-1wt% to absorb UV; 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 key

MP weather resistance UV absorber HALS photo-oxidation

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