Material Analysis
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POE toughness insufficient, brittle fracture
Problem Phenomenon
POE product elongation at break <50%, brittle fracture without yielding
Cause Analysis
POE molecular weight low, toughness foundation insufficient; excessive crosslinking loses toughness; coarse crystallization increases brittleness
Solution
1) Select high molecular weight POE 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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