Material Analysis
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EEA Insufficient Toughness, Brittle Fracture
Problem Phenomenon
EEA product elongation at break <50%, brittle fracture without yielding
Cause Analysis
EEA molecular weight low, toughness foundation insufficient; excessive crosslinking, toughness lost; coarse crystallization, brittleness increased
Solution
1) Select high-molecular-weight EEA to improve toughness; 2) Control crosslinking degree to avoid excess; 3) Nucleating agent to refine crystallization and improve toughness
Key Takeaway
Insufficient toughness is caused by low molecular weight and coarse crystallization; selecting high MW is key
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