Material Analysis
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Weather resistance of modified polyamide 12 (long carbon chain nylon) not up to standard
Fenómeno do problema
The weather resistance of modified polyamide 12 (long carbon chain nylon) is not up to standard, with yellowing, embrittlement, or significant performance decline after outdoor use
Análise das causas
（1）No ultraviolet absorber is added or the addition amount is insufficient
（2）The antioxidant system is imperfect
（3）The ultraviolet absorber has poor compatibility with polyamide 12 (long carbon chain nylon)
（4）The antioxidant is consumed and degraded during processing
（5）Unreasonable formulation design
Solução
（1）Add an appropriate amount of ultraviolet absorber (0.2-0.5%)
（2）Improve the antioxidant system with primary/secondary antioxidant combination
（3）Select a UV absorber with good compatibility
（4）Avoid high-temperature degradation of the antioxidant during processing
（5）Optimize the formulation design
Conclusão principal
Weather resistance needs to be addressed from UV absorbers and antioxidants
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