Material Analysis
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DSTDP insufficient toughness, brittle fracture
Problem Phenomenon
DSTDP product elongation at break <50%, brittle fracture without yielding
Cause Analysis
DSTDP molecular weight on the low side, toughness foundation insufficient; excessive crosslinking losing toughness; coarse crystallization, brittleness increased
Solution
1) Select high molecular weight DSTDP 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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