Material Analysis
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Fast EVOH Thermal Aging
Problem Phenomenon
EVOH products aged at 80°C for 7 days show mechanical decline >30%
Cause Analysis
EVOH molecular chains break and degrade under thermo-oxidation; antioxidant system incomplete, protection insufficient
Solution
1) Improve antioxidant system 1010+168+DSTDP; 2) Select high molecular weight grade; 3) Add metal deactivator 0.05wt%
Key Takeaway
Thermal aging is caused by thermo-oxidation; improving antioxidant system is key
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