Material Analysis
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MP insufficient toughness brittle fracture
Fenómeno do problema
MP product elongation at break <50%, brittle fracture without yielding
Análise das causas
MP molecular weight low, toughness foundation insufficient; excessive crosslinking loses toughness; coarse crystallization increases brittleness
Solução
1) select high molecular weight MP to improve toughness; 2) control crosslinking degree to avoid excess; 3) nucleating agent to refine crystallization and improve toughness
Conclusão principal
insufficient toughness is caused by low molecular weight and coarse crystallization; selecting high MW is key
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