Material Analysis
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Weather resistance of modified transparent ABS (methyl methacrylate-acrylonitrile-butadiene-styrene copolymer) not up to standard
Fenómeno del problema
Weather resistance of modified transparent ABS (methyl methacrylate-acrylonitrile-butadiene-styrene copolymer) is not up to standard; yellowing, embrittlement, or obvious performance decline after outdoor use
Análisis de la causa
No ultraviolet absorber added or insufficient addition amount
Incomplete antioxidant system
Poor compatibility between ultraviolet absorber and transparent ABS (methyl methacrylate-acrylonitrile-butadiene-styrene copolymer)
Antioxidant consumed and degraded during processing
Unreasonable formulation design
Solución
Add appropriate ultraviolet absorber (0.2-0.5%)
Improve the antioxidant system, main/auxiliary antioxidant coordination
Select UV absorbers with good compatibility
Avoid high-temperature degradation of antioxidants during processing
Optimize formulation design
Conclusión clave
Weather resistance needs to start from UV absorbers and antioxidants
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