Material Analysis
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Low EAA elongation at break
Problem Phenomenon
EAA product elongation at break <100% below the 200% requirement
Cause Analysis
EAA molecular weight too low, short chains with insufficient entanglement; excessive orientation causing extremely low transverse elongation; excessive crosslinking restricting chain slippage
Solution
1) Select high molecular weight EAA to increase entanglement density; 2) Reduce orientation by lowering injection speed; 3) Control crosslinking degree to avoid excess
Key Takeaway
Low elongation at break is caused by low molecular weight and orientation; selecting high MW and reducing orientation is key
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