Material Analysis
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Fast thermal aging of PU
Problem Phenomenon
After aging at 80°C for 7 days, PU product mechanical properties decrease >30%
Cause Analysis
PU molecular chains break and degrade under thermo-oxidation; antioxidant system imperfect, insufficient protection
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 the antioxidant system is key
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