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